Environment terminology · MLC-0121
Environment terms: C (3,357)
- Causal chain diagramA logical model that specifies how a management action or policy is expected to propagate through the...
- Causal CriteriaConsiderations that are employed to assist judgment concerning causation.
- Causal EliminationRejection of a candidate cause based on evidence that an expected association between that cause and the...
- Causal EvidenceData analysis results that reveal an association between the biological condition and a candidate cause.
- Causal Inference1. The component of a causal analysis that is specifically concerned with the interpretation of evidence to...
- Causal MechanismThe process by which a cause induces an effect.
- Causal ModelA model or portrayal of the theorized causal relationships between concepts or variables.
- Causal Pathway1. The sequence of processes and states that causally connect a source to exposure to a causal agent...
- Causal Relationship1. The relationship of cause and effect. The cause is the act or event that produces the effect. The cause is...
- Causal ScenarioA type of cause that consists of two or more interacting agents. Examples include low pH and metals, or high...
- Causal VariableParameters (e.g., total nitrogen and total phosphorus) whose presence result in a change in an identified...
- Causal variables (in the context of nutrient criteria)Parameters (e.g., total nitrogen and total phosphorus) whose presence result in a change in an identified...
- Cause1. That which produces an effect (a general definition).
- Cause NameA Cause of an impairment associated with a Probable Source.
- Cause UnknownCause Unknown is a reporting category used when a state has monitored and detected degraded conditions in a...
- CausticAble to burn, corrode, dissolve, or eat away other substances.
- Caustic SodaSodium hydroxide, a strong alkaline substance used as the cleaning agent in some detergents.
- Caustics1. Chemicals that burn or corrode people's skin, eyes, and mucus membranes (lining of the nose, mouth...
- CaveNatural underground passageway or chamber, or a hollowed out cavity in the side of a cliff.
- Cavia porcellusDomesticated Guinea Pig
- Cavitation1. (CAV-uh-TAY-shun) The formation and collapse of a gas pocket or bubble on the blade of an impeller or the...
- C&D LandfillA landfill designed for and accepting only construction and demolition materials.
- cDNA LibraryA collection of DNA sequences that code for genes. The sequences are generated in the laboratory from mRNA...
- CecumThe blind sac or outpouching area of the large intestine that is below the entrance of the small intestine...
- Cedar-Apple RustCondition in which the fungus Gymnosporangium juniperi-virginianae attacks two host plants, such as juniper...
- Ceiling Plenum1. Space between a suspended ceiling and the floor above that may have mechanical and electrical equipment in...
- CelastralesOrder of tropical flowering plants
- Celastrus orbiculatusOriental bittersweet is a deciduous woody perennial plant which grows as a climbing vine and a trailing...
- Cell AdhesionA cellular process initiated by cell adhesion molecules which results in the attachment of a cell to either...
- Cell AgingProgression of the cell from its inception to the end of its lifespan.
- Cell BarrierVery thin region of static electric charge along the interface of the positive and negative layers in a...
- Cell (Battery)A single unit of an electrochemical device capable of producing direct voltage by converting chemical energy...
- Cell Burner BoilerWall-fired boiler that utilizes two or three circular burners combined into a single vertically oriented...
- Cell CommunicationAny of several ways in which living cells of an organism communicate with one another, whether by direct...
- Cell Cycle CheckpointPhases or points in the cell cycle at which a cell is prevented from progressing into the next phase of the...
- Cell Cycle CompletionProcesses that mark, promote, or produce the conclusion of cell division and promote cell entry into...
- Cell Cycle PhaseAny one of the major conceptual divisions of the eukaryotic cell cycle, based on characteristic cytological...
- Cell Cycle Process1. The complex series of phenomena, occurring between the end of one cell division and the end of the next...
- Cell Cycle ProgressionThe cell cycle is an ordered set of events. Progression through the stages of cell cycle, including...
- Cell Cycle Regulation Process1. Control of the rate or manner of the periodic biochemical and structural events occurring during...
- Cell DeathThe termination of the cell's ability to carry out vital functions such as metabolism, growth, reproduction...
- Cell Death Signaling ProcessAny type of stress response signaling that results in modification to the process of cell death.
- Cell DefenseSelf-protection mechanisms of cells.
- Cell Differentiation1. Progressive restriction of the developmental potential and increasing specialization of function which...
- Cell Differentiation InductionCell Differentiation Induction involves initiation of progressive and normally irreversible processes whereby...
- Cell Differentiation InhibitionCell Differentiation Inhibition involves interference or restraint of progressive and normally irreversible...
- Cell DivisionThe process by which cells multiply involving both nuclear and cytoplasmic division.
- Cell EnvelopeThe protective coating around a cell, made up of the cell wall and cytoplasmic membrane
- Cell Fate ControlCell Fate Control involves intercellular, cellular, and intracellular processes that regulate the generally...
- Cell Free SystemA fractionated cell extract that maintains a biological function. A subcellular fraction isolated by...
- Cell FusionFusion in vitro of two or more cells or protoplasts.
- Cell GrowthThe complex series of phenomena occurring after cell division and before cell death.
- Cell Growth ProcessComplex cellular phenomena occurring apart from cell division that support cell viability and differentiated...
- Cell Growth RegulationCell growth regulation controls the rate, or the mechanism, of complex coordinated cellular phenomena that...
- Cell JunctionArea of immediate contact between two layers (positive and negative) of a photovoltaic cell. The junction...
- Cell MaintenanceProcesses that promote, sustain, and preserve cell viability. (NCI)
- Cell MaturationProcesses that create, promote, and maintain a differentiated cellular phenotype. (NCI)
- Cell Membrane ProcessCell Membrane Alteration consists of a change in the quality of the existing state of activities involved in...
- Cell Membrane ProteinACE2 enzyme is a cell membrane protein, which the novel SARS-CoV-2 uses as a receptor to enter cells.
- Cell Migration InhibitionCell Migration Inhibition involves interference with, or restraint of, active directed translocation of a...
- Cell MobilityCell Mobility consists of passive translocation of the whole cell, or cell body, from one site to another.
- Cell MotilityCell Motility consists of active translocation of a whole cell, or cell body, from one site to another...
- Cell MovementCell Movement involves translocation of a whole cell, or cell body, from one site to another; distinct from...
- Cell Movement ProcessCell Movement Process consists of a change of position or place of a major cell surface extension (such as...
- Cell NecrosisThe pathological process occurring in cells that are dying from irreparable injuries. It is caused by the...
- Cell OntologyDevelopment of the individual cell, as distinguished from phylogeny, which is evolutionary development of the...
- Cell Physiological ProcessCellular processes, properties, and characteristics.
- Cell Proliferation1. Involves the growth and reproduction of similar cells by cell division, resulting in an increase in cell...
- Cell Proliferation Regulatory ProcessCell Proliferation Regulation involves intercellular, cellular, and subcellular mechanisms that determine...
- Cell Proliferation StimulationStimulation of Cell Proliferation involves intercellular, cellular, and subcellular mechanisms that induce...
- Cell Respiration1. A two-stage process in which molecules are oxidized to produce energy. In the first stage, glucose is...
- Cell Senescence InductionAny cellular process that increases the rate, frequency or extent of cell aging.
- Cell Shape RegulationIntracellular or extracellular processes that control, manage, or govern adoption or maintenance of sustained...
- Cell Signaling MeasurementThe process by which a cell responds to substances in its environment. The binding of a substance to a...
- Cell Size RegulationIntracellular or extracellular processes that control, manage, or govern adoption, production, or maintenance...
- Cell Stress ProcessCellular or subcellular processes involved in disturbance or restoration of a homeostatic condition. (NCI)
- Cell Stress ResponseCellular or subcellular processes involved in restoration of a homeostatic condition.
- Cell Surface ExtensionCell Surface Extension is a coordinated cellular process involving the cell membrane, cytoskeleton...
- Cell SurvivalA process that encompasses the viability of a cell and its ability to subsist and maintain the integrity of...
- Cell Viability ProcessA cellular process that directly affects the ability of a cell to repair damaged cell components. (NCI)
- Cell WallThe outermost layer of a cell in most PLANTS; BACTERIA; FUNGI; and ALGAE. The cell wall is usually a rigid...
- Cell Wall AlterationInvolves a change in the existing structure or function of the rigid protective structure outside of, and...
- Cell-Cell AdhesionAny cellular process in which one cell attaches to another via cell adhesion molecules.
- Cell-Cycle ProteinsProteins that control the cell division cycle. This family of proteins includes a wide variety of classes...
- Cell-Matrix AdhesionAny cellular process in which a cell attaches to the extracellular matrix via adhesion molecules.
- Cell-Mediated CytotoxicityAny of the processes involved in cytolysis of a target cell by effector lymphocytes, such as cytotoxic T...
- Cells1. In solid waste disposal, holes where waste is dumped, compacted, and covered with layers of dirt on a...
- Cellular CytotoxicityAny of the processes involved in cytolysis of a target cell by effector lymphocytes, such as cytotoxic T...
- Cellular ImmunityManifestations of the immune response which are mediated by antigen-sensitized T-lymphocytes via lymphokines...
- Cellular MigrationCell Migration consists of active directed translocation of a whole cell, or cell body, from one site to...
- Cellular Migration InductionCell Migration Induction involves initiation of active directed translocation of a whole cell, or cell body...
- Cellular Mobile Radio Telephone SystemAlso called "Cellular." A high capacity land mobile telephone system wherein channels assigned to the system...
- Cellular RespirationThe metabolic process of all living cells (animal and plant) in which oxygen is used to provide a source of...
- Cellular Secretion1. Production by a cell or aggregation of cells (a gland) of a physiologically active substance and its...
- Cellular StressCellular or subcellular processes involved with significant disturbance from a homeostatic condition. (NCI)
- Cellular TechnologyThis term, often used for all wireless phones regardless of the technology they use, derives from cellular...
- Cellular TropismThe directional growth of a cell toward or away from a stimulus.
- Cellulose1. A polysaccharide that is the chief constituent of all plant tissues and fibers.
- Cellulose Fiber Loose-FillBasic material of recycled wood-based cellulosic fiber made from selected paper, paperboard stock, or ground...
- CELLULOSE TRIACETATE FILMA film base of transparent plastic that is relatively nonflammable but has some difficulty keeping its...
- Cellulose-Based EthanolEthanol produced from lignocellulose derived from such plant byproducts as corn stover and wood chips and...
- Cellulosic Biofuel1. Refers to the process of creating ethanol with a wide variety of feedstocks (corn stover, cereal straws...
- Cellulosic Biogas FeedstockIndividual feedstock used to produce biogas that contains at least 75% average adjusted cellulosic content...
- Cellulosic BiomassPlant-based material consisting of cellulose, hemicellulose, and lignin.
- Cellulosic Biomass Ethanol1. Cellulosic biomass ethanol means either of the following:(1) Ethanol derived from any lignocellulosic or...
- Cellulosic DieselRenewable fuel which meets both the definitions of cellulosic biofuel and biomass-based diesel. Cellulosic...
- CellulosicsCellulosics are thermoplastic resins manufactured by chemical modification of cellulose [(C6H10O5)n]...
- CementMaterial used to support and seal the well casing to the rock formations exposed in the borehole. Cement also...
- Cement bond log1. An acoustic amplitude log that is used to determine the location of cement behind the casing and, under...
- Cement Kiln1. Type of industrial furnace that receives hazardous waste to burn as fuel to run its cement process. Cement...
- Cement Kiln DustNon-calcined to fully calcined dust produced in the kiln or pyroprocessing line. Cement kiln dust is a...
- Cement PlantFacility manufacturing cement by either the wet or dry process.
- Cement PlugPlaced in the borehole to prevent migration of fluids between the different formations. This also prevents...
- CementationOne of the processes that work together to turn sediment into sedimentary rock (lithification). Mineral-laden...
- Cementation factorThe cementation exponent (m) in Archie's equation relating formation-resistivity factor and porosity...
- CementitiousDensely packed and nonfibrous friable materials.
- CEMS PrecisionCloseness of a measurement to the actual measured value expressed as the uncertainty associated with repeated...
- CenosphereNaturally-occurring waste component of coal fly ash, are very small, inert, lightweight, hollow, “glass”...
- Censored Method1. Analytical methods that frequently produce non-numerical results for blanks (i.e., ND for 'non-detect')...
- Censoring (data)Data that includes both detected and non-detected results. Expressing a positive analytical measurement...
- Census AreaThose land areas defined by the U.S. Census Bureau either by their population density or total population.
- Census blocksStatistical areas bounded by visible features such as roads, streams, and railroad tracks. Generally small in...
- Census TractLand areas defined by the U.S. Census Bureau. Tracts can vary in size but each typically contains about 4,000...
- Census TractsLand areas defined by the U.S. Census Bureau. Tracts usually contain from 1,200 to 8,000 people, with most...
- Centaurea biebersteiniiSpotted knapweed, previously known as Centaurea biebersteinii, is a biennial or short-lived perennial. Its...
- Centaurea calcitrapaCrowds out native species.
- Centaurea diffusaIntroduced herbaceous plant. A weed
- Centaurea solstitialisYellow starthistle is an annual herbaceous plant. Plants are gray-green to blue-green, grow from 6 in. to 5...
- Center PivotA type of irrigation system that consists of a wheel-driven frame that supports a series of sprinkler...
- Center Pivot Irrigation(Use of ) An automated sprinkler system involving a rotating pipe or boom that supplies water to a circular...
- Center Pivot Irrigation InfrastructureInfrastructure to support water distribution by a system of sprinklers that move on wheeled towers in a...
- Center SteamPortion of assist steam introduced into the stack of a flare to reduce burnback.
- Centers for Disease Control and PreventionAn agency of the Department of Health and Human Services whose mission is to promote health and quality of...
- Center-Worked Prebake ProcessMethod of primary aluminum reduction using the prebake process in which the alumina feed is added down the...
- Central & Eastern EuropeScope Note: Use for region comprised of Hungary, Czech Republic, Bulgaria, Serbia, Montenegro, Croatia...
- Central Accumulation AreaOn-site hazardous waste accumulation area with hazardous waste accumulating in units subject to either...
- Central Air Handling Unit1. This is the same as an Air Handling Unit, but serves more than one area.
- Central California CoastalThe drainage into the Pacific Ocean from the Pescadero Creek Basin boundary to and including the Rincon Creek...
- Central Client Server SystemsIncludes various UNIX and Windows NT computer systems, efficiently managed in a production environment. NCC...
- Central Collection PointLocation were a generator of regulated medical waste consolidates wastes originally generated at various...
- Central Data Base Technical SupportProvides a wide variety of technical support to data base applications designers and developers on all...
- Central Data Exchange1. The Central Data Exchange serves as the EPA node on the Exchange Network and is the gateway for receiving...
- CENTRAL FILESFiles accumulated by several offices or organizational units and maintained and supervised in one location...
- Central LahontanThe Central Lahontan Basin Consisting of the Carson, Truckee, and Walker River Basins. California, Nevada...
- Central Limit TheoremIf random samples of size n are repeatedly drawn from a population of any distribution, the distribution of...
- Central Nervous System1. Portion of the nervous system which consists of the brain and spinal cord.
- Central Nervous System MeasurementMeasures of the functionality of the human brain and spinal cord
- Central Nervous System ProcessIn vertebrates, the processes of the brain and spinal cord.
- Central Nevada Desert BasinsThe Closed Desert Basins that discharge into South Central Nevada. California, Nevada. Area = 47100 sq.mi.
- CENTRAL PROCESSING UNITThe component of a computer system that interprets and carries out program instructions.
- CENTRAL SERVICE COST ALLOCATION PLANThe documentation identifying, accumulating, and allocating or developing billing rates based on the...
- Central Standard TimeSix hours behind Coordinated Universal Time
- Central tendency exposure1. A measure of the middle or the center of an exposure distribution. The mean is the most commonly used...
- Central Texas CoastalThe coastal drainage and associated waters from the Colorado River Basin boundary to Aransas Pass and the...
- Central Warm Air FurnaceA type of space heating equipment where a central combustor or resistance unit generally using gas, fuel oil...
- Centralized Combustion Control DeviceEnclosed combustion devices that are used to control process vent emissions from non-dedicated PMPU's at a...
- Centralized Deicing PadFacility on an airfield designed for aircraft deicing operations, typically constructed with a drainage...
- Centralized Oil and Natural Gas Production FacilityOne or more storage vessels and all equipment at a single surface site used to gather, for the purpose of...
- Centralized Oil Production SitePermanent combination of one or more hydrocarbon liquids storage tanks located on one or more contiguous or...
- Centralized Waste Treatment FacilityAny facility that treats (for disposal, recycling or recovery of material) any hazardous or non-hazardous...
- Centralized Waste Treatment WastewaterAny wastewater generated as a result of CWT activities. CWT wastewater sources may include, but are not...
- Centralized Wastewater Treatment SystemA managed system consisting of collection sewers and a single treatment plant used to collect and treat...
- CentralizerA device designed to maintain a probe in the center of a borehole.
- Centrally Fueled BusBus that is refueled at least 75 percent of the time at one refueling facility that is owned, operated, or...
- Centrally Fueled Vehicle FleetA fleet, or that part of a fleet, consisting of vehicles that are fueled 100 percent of the time at a...
- Centrally Fueled Vehicles TotalSum of those vehicles that are centrally fueled and those vehicles that are capable of being centrally fueled.
- CentrateThe water leaving a centrifugal after most of the solids have been removed.
- Centrifugal CollectorA mechanical system using centrifugal force to remove aerosols from a gas stream or to remove water from...
- Centrifugal Compressor1. Any equipment that increases the pressure of a process natural gas or CO2 by centrifugal action, employing...
- Centrifugal Compressor Dry SealSeries of rings around the compressor shaft where it exits the compressor case that operates mechanically...
- Centrifugal Compressor Dry Seal EmissionNatural gas or CO2 released from a dry seal vent pipe and/or the seal face around the rotating shaft where it...
- Centrifugal Compressor Sour Seal Oil Separator and Capture Systemwet seal centrifugal compressor system which has an intermediate closed process that degasses most of the gas...
- Centrifugal Compressor Wet Seal Degassing Vent EmissionEmissions that occur when the high-pressure oil barriers for centrifugal compressors are depressurized to...
- Centrifugal MethodSpin-casting except that excess water is removed.
- Centrifugal Pump(sen-TRIF-h-gull) A pump consisting of an impeller fixed on a rotating shaft that is enclosed in a casing...
- Centrifugal SeparatorsMechanical separation of liquids or particles of different densities. Used to separate oil from water and...
- Centrifuge1. A mechanical device that uses centrifugal or rotational forces to separate solids from liquids.
- Centriole1. Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear...
- CephalizationThe localization of neural coordinating centers and sensory organs at the anterior end of the body.
- CephalodiaLittle pockets of cyanobacteria that form on top of a chlorolichen, normally black in color.
- Cephalopod1. A type of mollusk. The brief squid is the only cephalopod common to the Chesapeake Bay.
- CephalothoraxThe region of the body in decapod crustaceans that is covered by the carapace, with the boundary between the...
- Ceramic PlantManufacturing plant producing ceramic items.
- Ceramic Product1. Ceramics are defined as a class of inorganic, nonmetallic solids that are subject to high temperature in...
- CERCLAComprehensive Environmental Response, Compensation, and Liability Act (1980): See Superfund.
- CERCLA Hazardous SubstancesHazardous substance as defined by statute in CERCLA section 101(14); the list of CERCLA hazardous substances...
- CERCLA Pollutant or ContaminantSection 101(33) of CERCLA states that: "pollutant or contaminant shall include, but not be limited to, any...
- CERCLA Priority Pollutants Pollutant CategoryComprehensive Environmental Response, Compensation, and Liability Act (CERCLA) hazardous substances are...
- CERCLA ResponseAs defined by section 101(25) of CERCLA, means remove, removal, remedy, and remedial action, all such terms...
- CERCLA Response Action1. Remove, removal, remedy and remedial action, as those terms are defined by section 101 of CERCLA, 42...
- CERCLIS1. The federal Comprehensive Environmental Response, Compensation, and Liability Information System. This...
- CERCLIS 3The most current version of CERCLIS, the database that houses all Superfund site information.
- Cercospora sojinaFrogeye leaf spot (FLS) of soybean, caused by Cercospora sojina K. Hara, has been a problem in the southern...
- CerealBreakfast cereal.
- Cereal GrainThe edible seeds of specific grasses belonging to the Poaceae family, including wheat, oats, rice, rye...
- Cerebral AtrophyAtrophy of the cerebrum caused by focal or generalized neuronal loss.
- Cerebrovascular DiseaseA spectrum of pathological conditions of impaired blood flow in the brain. They can involve vessels (ARTERIES...
- CeriodaphniaA Type of cladoceran. Helpful in bioassay studies to determine chemical water quality standards for NPDES...
- Certain Glycol Ethers (1.0)R- (OCH₂CH₂)n - OR' where: n=1,2, or 3; R=Alkyl C7 or less; or R=phenyl or alkyl substituted phenyl; R'=H or...
- Certain PesticideDemeton, guthion, malathion, mirex, methoxychlor, and parathion.
- Certificate Holder1. A manufacturer holding a valid Certificate of Conformity issued by EPA.
- Certificate of AnalysisDocument that certifies the contents of an import meets the nominal composition following sampling and...
- Certificate of Conformity1. The document issued to a motor vehicle or motor vehicle engine manufacturer by EPA under section 206(a) of...
- Certificate of Conformity SpecificationStated or otherwise specified in a certificate of conformity or an approved application for certification...
- Certificate of RepresentationCompleted and signed submission required by § 72.20, for certifying the appointment of a designated...
- Certification1. Procedure by which a third party gives written assurance that a product, process, or service conforms to...
- Certification and Verification1. Refers to the certification and verification of green power products.
- Certification ApplicationManufacturer's submission of an application for certification.
- Certification Carryover1. Relating to certification based on emission data generated from an earlier model year as described in §...
- Certification ModificationAction(s) taken by the Administrator that alters the terms or conditions of certification pursuant to section...
- Certification RevocationAny action taken by the Administrator to terminate the certification pursuant to section 8(d)(1) of the WIPP...
- Certification Sales RegionThe area of the country where the vehicle can legally be sold. New federally certified vehicles can be sold...
- Certification Short TestTest, for gasoline-fueled Otto-cycle light-duty vehicles and light-duty trucks, performed in accordance with...
- Certification StandardMeasure of knowledge and ability which must be demonstrated as a requirement for certification.
- Certification Statement1. Written statement regarding a specific fact or representation that contains the following language: Under...
- Certification SuspensionAny action taken by the Administrator to withdraw, for a limited period of time, the certification pursuant...
- Certification VehicleVehicle which is selected under § 86.1828 of this chapter and used to determine compliance under § 86.1848 of...
- CertifiedCovered by a Certificate of Conformity issued by EPA.
- Certified Applicator1. Any individual who is certified to use or supervise the use of any restricted use pesticides covered by...
- Certified ButaneButane that is certified to meet the requirements in § 1090.250.
- Certified Butane BlenderA blending manufacturer that produces gasoline by blending certified butane into PCG and that uses the...
- Certified Butane ProducerA regulated blendstock producer that certifies butane as meeting the requirements in § 1090.250.
- Certified Emission Level1. Highest deteriorated emission level in an engine family for a given pollutant from either transient or...
- Certified Emissions LifePeriod during which the engine is designed to properly function in terms of reliability and fuel consumption...
- Certified EquipmentEquipment certified in accordance with the certification regulations contained in this subpart.
- Certified Ethanol DenaturantEthanol denaturant that is certified to meet the requirements in § 1090.275.
- Certified Ethanol Denaturant ProducerAny person that certifies ethanol denaturant as meeting the requirements in § 1090.275.
- Certified Non-Transportation 15 ppm Distillate Fuel1. Fuel that meets all of the following: (1) It has been certified as complying with the 15 ppm sulfur...
- Certified Observer1. A visual emission observer, certified under (if applicable) Method 303 and Method 9 (if applicable) and...
- Certified PentanePentane that is certified to meet the requirements in § 1090.255.
- Certified Pentane BlenderA blending manufacturer that produces gasoline by blending certified pentane into PCG and that uses the...
- Certified Pentane ProducerA regulated blendstock producer that certifies pentane as meeting the requirements in § 1090.255.
- Certified Pesticide Applicator1. Any individual who is certified under Section 4 of the Federal Insecticide, Fungicide, and Rodenticide Act...
- Certified Product Data Sheet1. Documentation furnished by suppliers of inks, coatings, varnishes, adhesives, primers, solvents, and other...
- Certified Reference Material1. Reference material characterized by a metrologically valid procedure for one or more specified properties...
- Certified Refrigerant Recovery EquipmentEquipment manufactured before November 15, 1993, that meets the standards in § 82.158(c), (e), or (g)...
- Certified Refrigerant Recycling EquipmentEquipment manufactured before November 15, 1993, that meets the standards in § 82.158(c), (e), or (g)...
- Certified StandardCalibration gases certified by the manufacturer of the calibration gases to be accurate to within 2 percent...
- Certified Stationary Internal Combustion EngineEngine that belongs to an engine family that has a certificate of conformity that complies with the emission...
- Certifier1. An individual or organization who assesses compliance of an entity against an applicable standard or set...
- CertifyIn reference to the volatile organic compounds (VOC) content or volatile organic hazardous air pollutants...
- Certifying AgencyPerson or agency designated by the Governor of a State, by statute, or by other governmental act, to certify...
- Certifying Authority1. Agency, or a State, Tribal, or Federal agency that issues restricted use pesticide applicator...
- Certifying Official1. All applications, including NOIs, must be signed as follows: 1.) For a corporation: By a responsible...
- CesiumA metal that may be stable (non radioactive) or unstable (radioactive). The most common radioactive form of...
- Cesium-137A radioactive cesium isotope. A byproducts of nuclear fission processes in nuclear reactors and nuclear...
- Cessation lagThe time between a reduction in exposure and the reduction in risk. See latency for a definition of a related...
- Cesspool1. A drywell that receives untreated sanitary waste containing human excreta, which sometimes has an open...
- Cetane IndexNumber representing the ignition properties of diesel fuel oils from API gravity and mid-boiling point as...
- CetirizineA potent second-generation histamine H1 antagonist that is effective in the treatment of allergic rhinitis...
- CFREffluent Limitations Guidelines and Standards (ELGs) are codified in the Code of Federal Regulations (CFR)...
- Chain Locker EffluentThe accumulated precipitation and seawater that is emptied from the compartment used to store the vessel's...
- Chain of Custody1. Tracing of a product or commodity through a supply chain to determine that it has met the criteria of the...
- Chain of InfectionProcess that begins when an agent leaves its reservoir or host through a portal of exit, and is conveyed by...
- Chain of TitleA history of conveyances and encumbrances affecting a title from the time that the original patent was...
- Chain ReactionA reaction that initiates its own repetition. In a fission chain reaction, a fissionable nucleus absorbs a...
- Chain-Reaction PolymerizationMonomers are added to the polymeric chain without the formation of a separate molecule. An initiator starts...
- ChainsawHandheld powered saw with teeth on a chain which circles around a bar.
- Chalk SticksUsed to mark treated, fresh, or special-needs cows.
- Chalkboard ResurfacerCoating formulated and recommended for application to chalkboards to restore a suitable surface for writing...
- Challenge AgentType of substance that is given to healthy subjects in order to induce a physiological response that the...
- Chamber CleaningProcess type that consists of the process sub-types defined in paragraphs (1) through (3) of this...
- Chamber Exhaust VentPoint(s) through which ethylene oxide-laden air is removed from the sterilization chamber during chamber...
- Change1. Providing information on change requires the ability to compare the resource status at two different time...
- Change DriversStrategic, policy, performance and industry factors impacting the design and implementation of business and...
- Change Order1. Written order issued by a recipient, or its designated agent, to its contractor authorizing an addition...
- Change-In-Service ModificationsModifications to an UST system such that a non-regulated material will be stored in a tank that held a...
- Channel1. A stream or river bed; generally refers to the physical form where water commonly flows.
- Channel BarThe lowest prominent geomorphic feature higher than the channel bed.
- Channel ErosionErosion in channels is mostly caused by downward scour due to flow shear stress. Side wall sluffing can also...
- Channel ImprovementThe improvement of the flow characteristics of a channel by clearing, excavation, realignment, lining, or...
- channel incision and wideningA process of channel degradation that results in a lower elevation channel surrounded by one or more elevated...
- channel reconfigurationRiver and stream channel engineering for the purpose of flood control, navigation, drainage improvement, and...
- Channel ResponseChanges in the shape or structure of a channel.
- Channel StabilizationErosion prevention and stabilization of velocity distribution in a channel using jetties, drops, revetments...
- Channelization1. The act of straightening a stream; typically widens and deepens the stream as well to improve the flow of...
- Channelization and DrainageRiver and stream channel engineering undertaken for the purpose of flood control, navigation, drainage...
- ChannelizerHighly visible barrels or drums that can be positioned to direct traffic through detours.
- Chaperone Protein InhibitionChaperone Protein Inhibition involves interference with, or restraint of, the activities of diverse cellular...
- Chaperone Protein Interaction ProcessChaperone Protein Interaction involves temporary non-covalent binding through intermolecular physical forces...
- CHARACTERIn electronic records, any symbol, such as a number, letter, or punctuation mark, that represents data and...
- Character generatorSubset of titles (see: titles) Refers to a process for creating titles.
- Characteristic1. The new STORET version of the legacy STORET parameter code system. Characteristic is connected to the...
- Characteristic Emission LevelCalculated emission level for each pollutant based on a statistical assessment of measured emissions from...
- Characteristic GroupCharacteristic names identify different types of environmental measurements, such as: aluminum, nitrogen, pH...
- Characteristic Waste1. Waste that is considered hazardous under RCRA because it exhibits any four different properties...
- CharacteristicsCharacteristic names identify different types of environmental measurements, such as: aluminum, nitrogen, pH...
- Characterization1. Characterization is the second step of an impact assessment and characterizes the magnitude of the...
- Characterization FactorFactor derived from a characterization model which is applied to convert the assigned LCI results to the...
- Characterization of Ecological Effects1. A portion of the analysis phase of ecological risk assessment that evaluates the ability of a stressor to...
- Characterization of Exposure1. A portion of the analysis phase of ecological risk assessment that evaluates the interaction of the...
- characterization of human health effectsA component of the analysis phase of microbial risk assessment that evaluates the ability of a pathogenic...
- Characterizing ecological effectsThe process for examining effects; evaluates stressor-response relationships or evidence that exposure to...
- Charcoal Lighter MaterialAny combustible material designed to be applied on, incorporated in, added to, or used with charcoal to...
- Charge1. Addition of iron and steel scrap or other materials into the top of an electric arc furnace. [40 CFR...
- Charge CarrierA free and mobile conduction electron or hole in a semiconductor. .
- Charge ChromeAlloy containing 52 to 70 percent by weight chromium, 5 to 8 percent by weight carbon, and 3 to 6 percent by...
- Charge ControllerA component of a photovoltaic system that controls the flow of current to and from the battery to protect it...
- Charge JunctionThe area of immediate contact between two layers (positive and negative) of a photovoltaic cell. The junction...
- ChargeabilityThe normalized (using the primary voltage) area under an induced polarization (IP) decay curve, between two...
- CHARGEOUTThe act and result of recording the removal and loan of a document or a file to indicate its location...
- Charging1. Operating mode for a batch copper converter during which molten or solid material is added into the...
- Charging LocationPhysical opening through which raw materials are introduced into a sinter machine, blast furnace, or dross...
- Charismatic MegafaunaLarge vertebrate animals that evoke sentimental support from the general public, for example, deer, sea...
- Chariton-GrandThe Chariton, Grand, and Little Chariton River Basins. Iowa, Missouri. Area = 10900 sq.mi.
- Chassis-Bases Heavy-Duty Vehicle AveragingExchange of NOX emission credits among test groups within a given manufacturer’s product line.
- Chat (Waste)Waste material that was formed in the course of milling operations employed to recover lead and zinc from...
- CheckSpecific tests in a quality assurance plan that are used to evaluate whether the specifications (performance...
- Check damA small dam constructed in a gully to decrease the flow velocity, minimize channel scour, and promote...
- Check sourceA radioactive source, not necessarily calibrated, which is used to confirm the continuing satisfactory...
- Check ValveA special valve with a hinged disc or flap that opens in the direction of normal flow and is forced shut when...
- ChecklistsA tool used to document the state analogs to federal regulatory requirements. They include a column to...
- ChecksSpecific tests in a quality assurance plan that are used to evaluate whether the specifications (performance...
- check-valve tubing pump1. A water sampling tool consisting of plastic tubing with a check valve attached to the bottom. Oscillation...
- Cheese CurdThe clumps of casein and other milk components that are formed during the cheese making process. These curds...
- Cheese Processing FungusFungus used in the production of cheeses
- Chelating ActivityNon-covalent, often coordinated, bonding between a metal and a biological molecule or complex where the...
- Chelating Agent1. Any of various compounds that combine with metals to form chelates and that include some used medically in...
- Chelation1. The joining together of metals (such as copper) with certain organic compounds.
- Chemical Abstract Service1. Since the 1890s, CAS has been assigning identification numbers to chemicals that companies register with...
- Chemical Abstract Service NumberA number assigned by the American Chemical Society that uniquely identifies a chemical. Search...
- Chemical Abstracts ServiceProvides information on chemical properties and interactions. Every year, the Chemical Abstracts Service...
- Chemical Abstracts Service Number1. Chemical Abstracts Service Registry Number. [40 CFR 704.3 (CFR 2013)]
- Chemical Abstracts Service Registry NumberA unique, chemical-specific number used in identifying a substance. The registry numbers are assigned by the...
- Chemical Abstracts Services Registry Number1. Refers to Chemical Abstracts Service Registry Number (http://www.cas.org/), a numerical index for chemical...
- Chemical AgentThose elements, compounds, or mixtures that coagulate, disperse, dissolve, emulsify, foam, neutralize...
- Chemical Agent and MunitionDefined as in 50 U.S.C. section 1521(j)(1).
- Chemical Agent Contamination EventHostile introduction into water, air, and soil of chemicals or toxic substances in a concentration that makes...
- Chemical Agent DecontaminationRemoval of chemical warfare agents such as noxious or toxic chemicals from exposed individuals, rooms and...
- Chemical Agent Resistant Coating1. Any exterior topcoat applied to military or U.S. Coast Guard vessels that are subject to specific...
- Chemical AnalogIn chemistry, a structural derivative of a parent compound.
- Chemical AnalysisA separation of compound substances by chemical means.
- Chemical AssociationAny process of combining chemical entities that is dependent upon chemical forces.
- Chemical, Biological or Radiological AttackHostile contamination with chemical, biological, or radiological agents
- Chemical CargoLatex, rubber, plastics, plasticizers, resins, soaps, detergents, surfactants, agricultural chemicals and...
- Chemical Carrier1. Any material, including but not limited to feed, water, soil, nutrient media, with which the test...
- Chemical CaseFor purposes of review and regulation, the grouping of chemically similar pesticide active ingredients (e.g...
- Chemical CharacterizationThe use of chemical structural information to predict properties and behavior of chemicals as a fundamental...
- Chemical Characterization and InformaticsResearch that provides information on chemicals including high-quality chemical structures, experimental and...
- Chemical CleaningCleaning by using a chemical instead of mechanical or abrasive cleaning.
- Chemical CleavageThe breaking of a chemical bond in a molecule resulting in smaller molecules.
- Chemical Coagulation with Iron SaltsThis is a precipatitive process for removing arsenic from drinking water. The mechanism involves adsorption...
- Chemical Coagulation/Filtration with Iron SaltsThis is a precipatitive process for removing arsenic from drinking water. The mechanism involves adsorption...
- Chemical CompatibilityProperty of a chemical to behave inertly, i.e., not react with, another chemical.
- Chemical ComplexCompound formed by the union of a metal ion with a nonmetallic ion or molecule called a ligand or complexing...
- Chemical CompositionName and percentage by weight of each compound in an additive and the name and percentage by weight of each...
- Chemical Compound1. A distinct and pure substance formed by the union or two or more elements in definite proportion by weight.
- Chemical ContaminantPesticides, pharmaceuticals, metals and other toxic substances that can harm the health of both humans and...
- Chemical contaminantsPesticides, pharmaceuticals, metals and other toxic substances that can harm the health of both humans and...
- Chemical ContaminationIntroduction into water, air, and soil of chemicals in a concentration that makes the medium unfit for its...
- Chemical Conversion Coating without ChromiumApplying a protective coating on the surface of a metal without using chromium. Such coatings are applied...
- Chemical Data Reporting (TSCA)1. The Toxic Substances Control Act...
- Chemical Decomposition ReactionUsually refers to one compound splitting into simpler substances.
- Chemical DegradationReduction of the complexity of a chemical compound by splitting off one or more groups or larger components...
- Chemical Derivative AvoidanceAvoid using blocking or protecting groups or any temporary modifications if possible. Derivatives use...
- Chemical Discharge EmergencyOccurs when a hazardous chemical that may represent a threat to human health has been released. Chemical...
- Chemical Disinfection1. Disinfection by using chemicals instead of heat and other physical, electrical, or radioactive methods.
- Chemical Element1. A fundamental substance comprising one kind of atom; the simplest form of matter.
- Chemical Emergency Preparedness and Prevention OfficeSee http://www.epa.gov/swercepp/. The Chemical Emergency Preparedness and Prevention Office (CEPPO) provides...
- Chemical Emulsion TreatmentRemoval of emulsion via chemical means.
- Chemical Etching1. Any step in the chemical milling or etching processes in which metal is chemically or electrochemically...
- Chemical Filtration with Iron SaltsThis is a precipatitive process for removing arsenic from drinking water. The mechanism involves adsorption...
- Chemical Fume SuppressantAny chemical agent that reduces or suppresses fumes or mists at the surface of an electroplating or anodizing...
- Chemical HazardChemical hazard means any element, compound, or mixture of elements and compounds. Chemical hazards may be...
- Chemical Hygiene PlanA written plan, the requirements of which are detailed in 29 CFR 1910.1450 that provides guidelines and...
- Chemical Identifier1. Any designation or identification such as code name, code number, trade name, brand name, or generic...
- Chemical Importer1. Any person who imports any chemical substance or any chemical substance as part of a mixture or article...
- Chemical Information Submission System1. EPA's web-based reporting tool for preparing and submitting TSCA submissions, or its successor system.
- Chemical Ionization Mass SpectrometryType of mass spectrometry in which ionization of the analyzed species is caused by chemical/ion reactions.
- Chemical Life Cycle ApproachThe application of the cradle-to-grave life cycle perspective to chemical design, manufacture and use, with...
- Chemical MachiningRemoving metal from a part by controlled chemical attack, or etching, to produce desired shapes and...
- Chemical Manufacturer1. Any establishment engaged in the mechanical or chemical transformation of materials or substances into new...
- Chemical ManufacturingThe Chemical Manufacturing subsector is based on the transformation of organic and inorganic raw materials by...
- Chemical Manufacturing PlantIndustrial plants that are classified by the Department of Commerce under Standard Industrial Classification...
- Chemical Manufacturing Process1. All equipment which collectively functions to produce a product or isolated intermediate. A process...
- Chemical Manufacturing Process UnitEquipment assembled and connected by pipes or ducts to process raw materials and to manufacture an intended...
- Chemical Metal Cleaning WasteAny wastewater resulting from the cleaning of any metal process equipment with chemical compounds, including...
- Chemical Milling1. Removing metal from a part by controlled chemical attack, or etching, to produce desired shapes and...
- Chemical Milling Maskant1. Coating that is applied directly to aluminum components to protect surface areas when chemical milling the...
- Chemical Milling Maskant Application OperationApplication of chemical milling maskant for use with Type I or Type II chemical milling etchants.
- Chemical MixtureAny combination of two or more substances.
- Chemical NameScientific designation of a chemical substance in accordance with the nomenclature system developed by the...
- Chemical of Special ConcernEPA designated that certain persistent bioaccumulative toxic (PBT) chemicals and PBT chemical categories...
- Chemical Oxidation1. Removal of electrons from an atom or ion. Usually by combining with oxygen ions. Minerals exposed to air...
- Chemical Oxygen Demand1. A measure of the oxygen-consuming capacity of inorganic and organic matter present in water or wastewater...
- Chemical PollutantChemical substance found in the environment in abnormally high concentrations or found in the environment...
- Chemical Pollutant ModelRepresentation of processes that involve chemical pollutants
- Chemical PrecipitationProcess to remove suspended solids from water. This term is also used for the addition of lime, alum, ferric...
- Chemical Precipitation TechnologyTechnology for the removal of metals and other inorganics, suspended solids, fats, oils, greases, and some...
- Chemical PreparationTarget HAP-containing product, or intermediate used in the manufacture of other products, manufactured in a...
- Chemical Preparations FacilityAny facility-wide collection of chemical preparation operations.
- Chemical Preparations Operation1. Any facility-wide collection of chemical preparation operations.
- Chemical Processor1. Any person who processes a chemical substance or mixture. [40 CFR 704.3 (CFR 2013)] [40 CFR 720.3 (CFR...
- Chemical Product1. Any compound or chemical listed in § 60.707 which is produced for sale as a final product as that...
- Chemical PropertyFeature which characterizes a chemical substance. For example, ph, acid, base or chemical class. Also...
- Chemical Protective ClothingItems of clothing that provide a protective barrier to prevent dermal contact with chemical substances of...
- Chemical RadicalA radical molecule contains at least one unpaired electron. With few exceptions, these unpaired electrons...
- Chemical reaction1. Interaction between chemicals in which there is a change in the chemical composition of the elements or...
- Chemical Reaction ParticipantCategories of substance involvement in chemical reactions.
- Chemical RecipientAny person who purchases or otherwise obtains a chemical substance directly from a person who manufacturers...
- Chemical Recovery Combustion SourceAny source in the chemical recovery area of a kraft, soda, sulfite or stand-alone semichemical pulp mill that...
- Chemical Recovery Combustion UnitCombustion device, such as a recovery furnace or fluidized-bed reactor where spent pulping liquor from...
- Chemical Recovery FurnaceEnclosed combustion device where concentrated spent liquor produced by the kraft or soda pulping process is...
- Chemical Recovery SystemAll existing DCE and NDCE recovery furnaces, smelt dissolving tanks, and lime kilns at a kraft or soda pulp...
- Chemical Reduction1. The addition of one or more electrons to an atom or molecule. In the case of a molecule, protons may be...
- Chemical Relational Database1. A Chemical Relational Database (CRD) application is a specialized relational database application that...
- Chemical Research Small Quantity1. Quantities of a chemical substance manufactured, imported, or processed or proposed to be manufactured...
- Chemical RoleA characteristic which exists only when the chemical is interacting with another chemical, the natural...
- Chemical Safety EvaluationEvaluation of the safety of existing chemicals via a the three stages of EPA’s process for ensuring the...
- Chemical Safety Information, Site Security & Fuels Regulatory Relief ActTo amend the Clean Air Act to remove flammable fuels from the list of substances with respect to which...
- Chemical ScavengerChemical or chemicals that can be applied to resins or composite wood products either during or after...
- Chemical Sedimentary RockSedimentary rock composed of minerals that were precipitated from water. This process begins when water...
- Chemical SensitizationEvidence suggests that some people may develop health problems characterized by effects such as dizziness...
- Chemical Soil CrustA soil-surface layer, ranging in thickness from a few millimeters to a few centimeters, that is formed when...
- Chemical SpeciesAn individual molecule or chemical compound.
- Chemical StressorChemicals released to the environment through industrial waste, auto emissions, pesticides, and other human...
- Chemical StressorsChemicals released to the environment through industrial waste, auto emissions, pesticides, and other human...
- Chemical Structure1. The location of the atoms, groups or ions relative to one another in a molecule, as well as the number...
- Chemical Substance1. Chemical substance or mixture.
- Chemical Substance (CFR Exceptions)1. Any organic or inorganic substance of a particular molecular identity, including any combination of such...
- Chemical Substance RecipientAny person who purchases or otherwise obtains a chemical substance directly from a person who manufacturers...
- Chemical Substance TransformationTo use and entirely consume (except for trace quantities) a controlled substance in the manufacture of other...
- Chemical Substance TypeChemical substances organized by their physical properties
- Chemical Substance Use StreamAll reasonably anticipated transfer, flow, or disposal of a chemical substance, regardless of physical state...
- Chemical Substances CategorySame meaning as in section 26(c)(2) of the Act (15 U.S.C. 2625).(5) [40 CFR 723.175 (CFR 2013)]
- Chemical SynthesisUsing one or a series of chemical reactions in the manufacturing process of a specified product.
- Chemical TreatmentAny one of a variety of technologies that use chemicals or a variety of chemical processes to treat waste.
- Chemical (treatment technology category)Chemical treatment of wastewater to create an oxidation-reduction reaction, disinfect, break emulsions...
- Chemical Use1. Any use of a substitute for a Class I or Class II ozone-depleting compound, including but not limited to...
- Chemical Use ConditionsCircumstances, as determined by the Administrator, under which a chemical substance is intended, known, or...
- Chemical Vapor DepositionMethod of depositing thin semiconductor films used to make certain types of photovoltaic devices. With this...
- Chemical Vapor Deposition Chamber CleaningIn the context of semiconductor manufacturing, a process type in which chambers used for depositing thin...
- Chemical Warfare AgentChemicals that are used to cause the disturbance, disease, or death of humans during war.
- Chemical Waste LandfillLandfill at which protection against risk of injury to health or the environment from migration of PCBs to...
- Chemical Waste PileA pile consisting primarily of discarded chemical products (whether marketable or not), by - products...
- Chemical WeatheringThe process that changes the chemical makeup of a rock or mineral at or near the Earth's surface. Chemical...
- Chemical-Focused Risk AssessmentStarts with a source and evaluates how the chemical gets from the source to various populations.
- ChemigationThe addition of one or more chemicals to the irrigation water.
- Chemiluminescent Ozone AnalyzerDesigned to measure ozone concentrations in ambient air.
- ChemisorbTo take up and hold, usually irreversibly, by chemical forces.
- ChemistryA basic science concerned with the composition, structure, and properties of matter; and the reactions that...
- ChemnetMutual aid network of chemical shippers and contractors that assigns a contracted emergency response company...
- Chemoautotrophic GrowthGrowth of organisms using autotrophic processes for obtaining nutrients and chemotrophic processes for...
- Chemoautotrophic MicroorganismMicroorganisms which get their energy by oxidizing certain inorganic compounds
- ChemokinesisThe response by a motile cell to a soluble chemical that involves an increase or decrease in speed, or...
- Chemolithotrophic MicroorganismObtain energy from minerals rather than from carbon compounds.
- Chemosensitization1. The synergistic action of two drugs, being greater than the sum of the effects of each used alone.
- ChemosterilantA chemical that controls pests by preventing reproduction.
- Chemotactic ProcessThe characteristic directional movement or orientation of an organism or cell along a chemical concentration...
- Chemotaxis InductionChemotaxis Induction involves initiation of characteristic movement or orientation of an organism or cell...
- Chemotaxis InhibitionChemotaxis Inhibition involves interference with, or restraint of, characteristic movement or orientation of...
- Chemotherapeutic WasteWaste material resulting from the production or use of antineoplastic agents used for the purpose of stopping...
- chemotrophsOrganisms that obtain energy from oxidation or reduction of inorganic or organic matter.
- ChemtrecThe industry-sponsored Chemical Transportation Emergency Center; provides information and/or emergency...
- Chenopodium ambrosioidesA biochemical pesticide used as an insecticide for acaricide on fields and container-grown non-food...
- ChernozemA major group of dark-colored zonal soils with a rich and deep humus horizon occurring in temperate-to-cool...
- ChesapeakeHistorians aren't sure of the true meaning of the name Chesapeake, but believe it is derived from the...
- Chewable SurfaceInterior or exterior surface painted with lead-based paint that a young child can mouth or chew. A chewable...
- CheyenneThe Cheyenne River Basin above the normal operating pool of Lake Oahe. Montana, Nebraska, South Dakota...
- Cheyne-Stokes respirationRespiratory distress related to posture (especially reclining at night) that occurs in association with heart...
- Chief Facility Operator1. Person in direct charge and control of the operation of an MWC and who is responsible for daily on-site...
- Chief Information Officer1. As defined in § 3.3 of CROMERR, the EPA official assigned the functions described in section 5125 of the...
- ChildPerson who has not attained the age of 18 years.[40 CFR 26.202 (CFR 2018)]
- Child Care FacilityLocation that houses a licensed provider of child care, day care, or early learning services to children, as...
- Child Resistant PackagingPackaging that protects children or adults from injury or illness resulting from accidental contact with or...
- Child-Bearing Age AdultRange of ages during which and adult woman may become pregnant.
- Childhood AsthmaChildren who live, attend school, or play near major roadways are more susceptible to asthma. Children living...
- Childhood ExposurePresence of toxins, pollutants or other harmful substances in an environment where children are living
- Childhood LeukemiaCancer of the white blood cells, is the most common childhood cancer
- Childhood Organophosphate Pesticide ExposurePresence of organophosphate pesticides in the environment, possibly leading to increased incidents of asthma...
- Child-Occupied FacilityBuilding, or portion of a building, constructed prior to 1978, visited regularly by the same child, under 6...
- ChildrenPeople less than 18 years of age.
- Childrens' HealthScientific evidence shows that children are different from adults in terms of their exposure and...
- Chilled Water LoopAny closed cooling water system that transfers heat from air handling units or refrigeration equipment to a...
- ChillerA device that generates a cold liquid that is circulated through an air-handling unit's cooling coil to cool...
- Chilling EffectThe lowering of the Earth's temperature because of increased particles in the air blocking the sun's rays.
- Chip Resistant Edge PrimerAnti-chip coating applied to the leading edge of parts such as the hood or roof.
- Chip SealMaterial composed of aggregate placed on top of a layer of an asphalt or asphaltic liquid binder. The...
- Chip SteamerVessel used for the purpose of preheating or pretreating wood chips prior to the digester, using flash steam...
- ChippewaThe Chippewa River Basin. Michigan, Wisconsin. Area = 9570 sq.mi.
- Chisel Plowing1. Cropland preparation by a special implement (chisel) that avoids complete inversion of the soil (as occurs...
- Chi-Square ResidualThe values printed at the end of the table are the observed minus expected values, divided by the standard...
- Chi-Square Test1. A statistical test used to examine the deviation of an observed number of events from an expected number...
- chi-squared distribution1. The chi-square distribution results when υ independent variables with standard normal distributions are...
- chi-squared goodness-of-fit test1. The chi-square test is used to test if a sample of data came from a population with a specific...
- Chi-Squared Goodness-of-Fit Test Method1. The chi-square test is used to test if a sample of data came from a population with a specific...
- Chitin1. A linear polysaccharide of beta-1->4 linked units of ACETYLGLUCOSAMINE. It is the second most abundant...
- ChlamydiaA genus of the family CHLAMYDIACEAE whose species cause a variety of diseases in vertebrates including...
- Chlamydial InfectionsInfection with bacteria of the genus Chlamydia.
- ChlamydosporeA thallic conidium that acts as a resting spore
- ChloracneAcne-like eruption caused by exposure to chlorine compounds
- Chlor-Alkali ProductionProduces chlorine and sodium hydroxide from electrolysis of sodium chloride.
- Chloramines1. Compounds formed by the reaction of hypochlorous acid (or aqueous chlorine) with ammonia.
- ChloratesInorganic salts of chloric acid that contain the ClO3- ion.
- chlordane1. Used as a pesticide until banned by the U.S. in 1983 (except for use in controlling underground termites)...
- ChlorideAn atom of chlorine in solution; an ion bearing a single negative charge.
- Chloride Channel BindingA process that involves the binding of calcium or an extracellular ligand to a calcium channel. These...
- Chloride ProcessProduction process where titanium dioxide is produced using calcined petroleum coke and chlorine as raw...
- Chlorinated DibenzofuransA family of 135 individual compounds with varying harmful health and environmental effects. CDFs typically...
- Chlorinated Hydrocarbons1. Chemicals containing only chlorine, carbon, and hydrogen. These include a class of persistent...
3,357 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.