Environment terminology · MLC-0121

Environment terms: C (3,357)

Page 1 of 7

• C 12-C 14 Ester and C 8 EsterFatty acid/2-ethylhexyl esters with carbon chain lengths ranging from 8 to 16 and represented by the Chemical...
• C FactorA factor of value used to indicate the smoothness of the interior of a pipe. The higher the C Factor, the...
• C HorizonThe deepest layer of soil profile. It consists of loose material or weathered rock that is relatively...
• C1 BasisConvention of expressing HC concentrations based on the total number of carbon atoms present, such that the...
• C1 EquivalentConvention of expressing HC concentrations based on the total number of carbon atoms present, such that the...
• C12-C14 EsterFatty acid/2-ethylhexyl esters with carbon chain lengths ranging from 8 to 16 and represented by the Chemical...
• C16-C18 Internal Olefin65/35 blend, proportioned by mass, of hexadecene and octadecene, respectively. Hexadecene is an unsaturated...
• C16-C18 Internal Olefin Drilling FluidC16-C18 internal olefin drilling fluid formulated as specified in appendix 1 of subpart A of this part.
• C-3 PhotosynthesisThe biochemical reactions, initiated by Rubisco, that result in the reduction of CO2 to a carbohydrate.
• C-3 Plant1. Plants (e.g., soybean, wheat, and cotton) whose carbon- fixation products have three carbon atoms per...
• C-4 PhotosynthesisCalled by this name because the first molecular product of carbon fixation has four carbons.
• C-4 PlantPlants (e.g., maize and sorghum) whose carbon fixation products have four carbon atoms per molecule. Compared...
• C8 EsterFatty acid/2-ethylhexyl esters with carbon chain lengths ranging from 8 to 16 and represented by the Chemical...
• CA Performance Standards Attained - Controls Required1. This event indicates remedies selected for the protection of human health and the environment standard...
• CA Performance Standards Attained - No Controls Are Necessary1. This event indicates remedies selected for the protection of human health and the environment standard...
• CA Prioritization - Facility or Area was Assigned a High Corrective Action Priority1. This event indicates that a facility or area has been prioritized using the National Corrective Action...
• CA Prioritization - Facility or Area was Assigned a Low Corrective Action Priority1. This event indicates that a facility or area has been prioritized using the National Corrective Action...
• CA Prioritization - Facility or Area was Assigned a Medium Corrective Action Priority1. This event indicates that a facility or area has been prioritized using the National Corrective Action...
• CA Responsibility Referred to a Non-RCRA Authority - CA Referred to Another Non-RCRA Authority1. The facility or area has been referred to CERCLA or some other non-RCRA authority. This does not imply...
• CA Responsibility Referred to a Non-RCRA Authority - CA Referred to CERCLA1. The facility or area has been referred to CERCLA or some other non-RCRA authority. This does not imply...
• CAA Stationary SourceGenerally, any source of an air pollutant except those emissions resulting directly from an internal...
• Cab over Axle VehicleCab which contains the operator/passenger compartment is directly above the engine and front axle and the...
• Cab over Engine VehicleCab which contains the operator/passenger compartment is directly above the engine and front axle and the...
• Cab-Complete Vehicle1. Vehicle that is first sold as an incomplete vehicle that substantially includes its cab. Vehicles known...
• CableAn assembly of one or more insulated conductors, or optical fibers, or a combination of both, within an...
• Cable Converter BoxEquipment often provided by a cable company in a subscriber’s home that allows access or controls...
• Cable loggingA system of transporting logs from stump to landing by means of steel cables and winch. This method is...
• Cable Signal LeakageExcessive levels of radio frequency (RF) energy that leak from cable television systems. Leak can cause...
• Cable TVA television distribution method in which signals from distant stations are received, amplified, and then...
• CactaceaeFlowering plant family of spiny succulents
• CADLinkA new beta version of a causal analysis database of literature.
• Cadmium1. A heavy metal that accumulates in the environment.
• Cadmium Compounds (0.1)Includes any unique chemical substance that contains cadmium as part of that chemical's infrastructure.
• Cadmium Melting FurnaceAny furnace used to melt cadmium or produce cadmium oxide from the cadmium recovered in the zinc production...
• Cadmium TelluridePolycrystalline thin-film photovoltaic material. .
• CAFOConcentrated Animal Feeding Operation (CAFO). An NPDES permit regulating discharge from Concentrated Animal...
• CAIR Authorized Account Representative1. With regard to a general account, a responsible natural person who is authorized, in accordance with...
• CAIR Designated Representative1. For a CAIR NOX source and each CAIR NOX unit at the source, the natural person who is authorized by the...
• CAIR Nitrogen Oxides AllowanceLimited authorization issued by a permitting authority or the Administrator under provisions of a State...
• CAIR Nitrogen Oxides Allowance DeductionPermanent withdrawal of CAIR NOX allowances by the Administrator from a compliance account, e.g., in order to...
• CAIR Nitrogen Oxides Allowance HeldCAIR NOX allowances recorded by the Administrator, or submitted to the Administrator for recordation, in...
• CAIR Nitrogen Oxides Allowance Tracking SystemSystem by which the Administrator records allocations, deductions, and transfers of CAIR NOX allowances under...
• CAIR Nitrogen Oxides Allowance Tracking System AccountAccount in the CAIR NOX Allowance Tracking System established by the Administrator for purposes of recording...
• CAIR Nitrogen Oxides Annual Trading ProgramMulti-state nitrogen oxides air pollution control and emission reduction program approved and administered by...
• CAIR Nitrogen Oxides Emissions LimitationCAIR NOX source, the tonnage equivalent, in NOX emissions in a control period, of the CAIR NOX allowances...
• CAIR Nitrogen Oxides Ozone Season AllowanceLimited authorization issued by a permitting authority or the Administrator under provisions of a State...
• CAIR Nitrogen Oxides Ozone Season Allowance DeductionPermanent withdrawal of CAIR NOX Ozone Season allowances by the Administrator from a compliance account...
• CAIR Nitrogen Oxides Ozone Season Allowance HeldCAIR NOX Ozone Season allowances recorded by the Administrator, or submitted to the Administrator for...
• CAIR Nitrogen Oxides Ozone Season Allowance Tracking SystemSystem by which the Administrator records allocations, deductions, and transfers of CAIR NOX Ozone Season...
• CAIR Nitrogen Oxides Ozone Season Allowance Tracking System AccountAccount in the CAIR NOX Ozone Season Allowance Tracking System established by the Administrator for purposes...
• CAIR Nitrogen Oxides Ozone Season Emissions LimitationFor a CAIR NOX Ozone Season source, the tonnage equivalent, in NOX emissions in a control period, of the CAIR...
• CAIR Nitrogen Oxides Ozone Season Source1. Source that is subject to the CAIR NOX Ozone Season Trading Program.
• CAIR Nitrogen Oxides Ozone Season Trading Program1. Multi-state nitrogen oxides air pollution control and emission reduction program approved and administered...
• CAIR Nitrogen Oxides Ozone Season UnitUnit that is subject to the CAIR NOX Ozone Season Trading Program under §96.304 and, except for purposes of...
• CAIR Nitrogen Oxides Source1. Source that includes one or more CAIR NOX units.
• CAIR Nitrogen Oxides UnitUnit that is subject to the CAIR NOX Annual Trading Program under §96.104 and, except for purposes of §96.105...
• CAIR Permit1. Legally binding and federally enforceable written document, or portion of such document, issued by the...
• CAIR Sulfur Dioxide AllowanceLimited authorization issued by the Administrator under the Acid Rain Program, or by a permitting authority...
• CAIR Sulfur Dioxide Allowance DeductionPermanent withdrawal of CAIR SO2 allowances by the Administrator from a compliance account, e.g., in order to...
• CAIR Sulfur Dioxide Allowance HeldCAIR SO2 allowances recorded by the Administrator, or submitted to the Administrator for recordation, in...
• CAIR Sulfur Dioxide Allowance Tracking SystemSystem by which the Administrator records allocations, deductions, and transfers of CAIR SO2 allowances under...
• CAIR Sulfur Dioxide Allowance Tracking System AccountAccount in the CAIR SO2 Allowance Tracking System established by the Administrator for purposes of recording...
• CAIR Sulfur Dioxide Emissions LimitationFor a CAIR SO2 source, the tonnage equivalent, in SO2 emissions in a control period, of the CAIR SO2...
• CAIR Sulfur Dioxide Source1. Source that is subject to the CAIR SO2 Trading Program.
• CAIR Sulfur Dioxide Trading ProgramMulti-state sulfur dioxide air pollution control and emission reduction program approved and administered by...
• CAIR Sulfur Dioxide UnitUnit that is subject to the CAIR SO2 Trading Program under §96.204 and, except for purposes of §96.205, a...
• Caisson(KAY-sawn) A structure or chamber which is usually sunk or lowered by digging from the inside. Used to gain...
• Cake ManureSurface manure on top of litter, typically only a few inches deep.
• CalcaneusHeel bone
• Calcareous1. Of or containing calcium carbonate, calcium, or limestone.
• Calcic HorizonThe calcic horizon is an illuvial horizon in which secondary calcium carbonate or other carbonates have...
• CalcificationProcess by which organic tissue becomes hardened by a deposit of calcium salts within its substance
• Calcimine RecoaterFlat solvent borne coating formulated and recommended specifically for recoating calcimine-painted ceilings...
• Calcination1. Process of thermally treating minerals to decompose carbonates from ore.
• CalcineSolid materials produced by a roaster.
• Calciner1. Unit in which the moisture and organic matter of phosphate rock is reduced within a combustion chamber.
• CalciteCommonly-occurring mineral of calcium carbonate
• CalcitriolThe physiologically active form of vitamin D. It is formed primarily in the kidney by enzymatic hydroxylation...
• calciumA base cation that helps to reduce acidification.
• Calcium BindingCalcium Binding consists of a biophysical interaction between one or more calcium ion(s) and a biological...
• Calcium CarbideMaterial containing 70 to 85 percent calcium carbide by weight.
• Calcium CarbonateA molecule consisting of calcium, carbon and oxygen that is secreted by corals, forming their skeleton; it...
• Calcium Carbonate EquivalentAn expression of the concentration of specified constituents in water in terms of their equivalent value to...
• Calcium Channel BindingA process that involves the binding of a cognate ligand to a member of the calcium channel receptor family...
• Calcium Channel InhibitionCalcium Channel Inhibition involves interference with, or restraint of, the activities of cell membrane...
• Calcium ChlorideA crystalline, white substance, soluble in water, Calcium Chloride is the chloride salt of calcium, a...
• Calcium MetabolismProcessing of calcium in the body: its absorption, transport, storage, and utilization.
• Calcium Oxide ProductionBy heating calcium carbonate in the form of limestone
• Calcium SaltsProducts of the reaction of calcium hydroxide with any acid.
• Calcium SignalingAny process that involves the local flux of calcium from the endoplasmic reticulum or sarcoplasmic reticulum...
• Calcium SiliconAlloy as defined by ASTM Designation A495-76 or 94 (incorporated by reference - see § 60.17).
• Calcium Sulfate Storage Pile RunoffCalcium sulfate transport water runoff from or through the calcium sulfate pile, and the precipitation which...
• Calcium-Channel BlockerA class of drugs that act by selective inhibition of calcium influx through cellular membranes.
• Calculated Cetane IndexNumber representing the ignition properties of diesel fuel oils from API gravity and mid-boiling point as...
• Calculation methodologyThe method used to measure, estimate, or calculate emissions.
• Calender CoatingCalender coating involves the production of plastic sheets that are then pressed between heated rollers...
• Calf1. A young male or female bovine under 1 year of age. Usually referred to as calves until reaching sexual...
• Calibrate1. To determine the response or reading of an instrument relative to a series of known values over the range...
• Calibrated BagFlexible, non-elastic, anti-static bag of a calibrated volume that can be affixed to an emitting source such...
• Calibration1. The establishment of an analytical curve based on the absorbance, emission intensity, or other measured...
• Calibration and Testing in Data Scarce SituationsThe likelihood of having complete data sets for extensive IEM analysis is low. Building representative data...
• Calibration Blank1. A sample of analyte-free media which is used to establish the low range of a calibration. (ORD).
• Calibration Blank (quality)1. A sample of analyte-free media which is used to establish the low range of a calibration. {ORD}...
• Calibration Curve1. The graphical relationship between the known values, such as concentrations, of a series of calibration...
• Calibration DriftChange in measurement system output over a stated period of time of normal continuous operation when the...
• Calibration Error1. Difference between:(1) The response of a gaseous monitor to a calibration gas and the known concentration...
• Calibration Gas1. Standard reference material
• Calibration Method1. A defined technical procedure for performing a calibration. {ORD} {OPP} {ORCR}
• Calibration Standard1. A substance or reference material used to calibrate an instrument. {OPP} {ORCR}
• calibration standardsA series of known standard solutions used by the analyst for calibration of the instrument (i.e., preparation...
• Calibration Verification Solution1. A solution of method analytes, used to evaluate the performance of the instrument system with respect to a...
• Calibration Verification Standard1. The mid-point calibration standard that is used to verify calibration. {OW/EAD} {OPP} {OAR/OAQPS} {ORCR}
• CalicheA term applied broadly in the southwest United States to a reddish-brown to buff or white calcareous material...
• California Air Resources Board analytical method 435A specialized polarized light microscopy (PLM) method used for testing asbestos content in the serpentine...
• California DieselDiesel fuel designated by a diesel fuel manufacturer as for use in California.
• California EPA's Reference Exposure LevelThe REL is a concentration at or below which no adverse non-cancer health effects anticipated for the...
• California GasolineGasoline designated by a gasoline manufacturer as for use in California.
• California ListInterim LDR treatment standards that ensured adequate protection of human health and the environment during...
• California Regiona) the drainage within the United States that ultimately discharges into the Pacific Ocean within the state...
• California Vehicle SaleVehicles that are produced, sold, and distributed (in accordance with normal business practices and...
• California-Only CertificateCertificate of conformity issued by EPA showing compliance with emission standards established by California.
• Caliper log1. A continuous record of hole diameter, usually made with a mechanical probe having from one to six arms.
• Caliper LoggingMethod of well logging which employs a mechanical tool to measure the diameter and shape of the borehole...
• CallusHealing tissue of trees on branches, boles, or roots that attempts to grow over scars or wounds.
• Callus FormationLocation of an irregular proliferation of cells generated in response stresses
• Calomel-Based Mercury Control SystemMercury emissions control system that uses scrubbers to remove mercury from the gas stream of a roaster or...
• CalveGiving birth to a calf. Same as parturition.
• Calvin CycleThe biochemical reactions, initiated by Rubisco, that result in the reduction of CO2 to a carbohydrate (also...
• CalyxOuter whorl of flowering parts; collective term for all the sepals of a flower.
• Cambic HorizonA cambic horizon is the result of physical alterations, chemical transformations, or removals or of a...
• Cambium1. Layer of living cells between the wood and the innermost bark of a tree. Each growing season the cambium...
• CAMERAA photographic device with an optical system that is used for exposing light-sensitive material.
• CAMERA MICROFILMFirst-generation microfilm.
• CAMERA-PROCESSORA device that functions as both a camera and a processor. See also PROCESSOR (3).
• Camera-readyartwork or pasted up material that is ready for reproduction.
• Campaign PlantProcess unit that manufactures different chemical products by periodically alternating raw materials fed to...
• CampingLiving outdoors as a recreational activity.
• Campylobacter1. A genus of bacteria found in the reproductive organs, intestinal tract, and oral cavity of animals and...
• Campylobacter jejuniGram-negative slender, curved, and motile rod. It is a microaerophilic organism, which means it has a...
• Campylobacteriosis1. The C. jejuni infection which causes diarrhea, which may be watery or sticky and can contain blood...
• CanContainer formed from sheet metal and consisting of a body and two ends or a body and a top.
• Can BodyFormed metal can, excluding the unattached end(s).
• Can EndCan part manufactured from metal substrate equal to or thinner than 0.3785 millimeters (mm) (0.0149 inch) for...
• Canadian Version VehicleA vehicle that complies with Canadian safety and emission standards and that is manufactured for the Canadian...
• Canal1. Man-made channels produced to facilitate navigation between water bodies.
• Cancellation1. Termination of an insurance coverage during the policy period by the voluntary act of the insurance...
• Cancer1. A disease of heritable, somatic mutations affecting cell growth and differentiation, characterized by an...
• Cancer Cell GrowthThe unregulated growth of cancer cells insofar as growth control and contact inhibition.
• Cancer Cell Growth RegulationControl of the rate or manner of occurrence of the complex series of phenomena occurring after division and...
• Cancer Cell Growth StimulationStimulation of Cancer Cell Growth involves intercellular, cellular, and subcellular mechanisms that induce...
• Cancer PotencyA number that estimates the cancer risk (incidence) for a lifetime exposure to a substance per unit of dose...
• Cancer ProgressionA pathologic process in which alterations at the molecular level result in a more aggressive cytologic and...
• Cancer Risk1. A theoretical risk for getting cancer if exposed to a substance every day for 70 years (a lifetime...
• Cancer Slope Factor1. An upper bound, approximating a 95% confidence limit, on the increased cancer risk from a lifetime...
• CandidaA genus of yeast-like mitosporic Saccharomycetales fungi characterized by producing yeast cells, mycelia...
• Candidate Cause1. A hypothesized cause of an environmental impairment, that is sufficiently credible to be analyzed.
• Candidate In-Use VehicleIn-use vehicle which would be eligible to participate in the in-use verification program in accordance with...
• Candidate MethodMethod for measuring the concentration of an air pollutant in the ambient air for which an application for a...
• Cane SugarProcessed sucrose extracted from the sugarcane plant, a perennial grass in the Saccharum genus.
• Caneberry ProcessingProcessing of the following berries: Canned and frozen blackberries, blueberries, boysenberries, currants...
• Canine Hip DysplasiaA hereditary disease of the hip joints in dogs. Signs of the disease may be evident any time after 4 weeks of...
• Canis familiarisThe domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are...
• Canister Working CapacityMeasured amount of hydrocarbon vapor that can be stored in a canister as specified in § 1060.240(e)(2)(i).
• CankerLocalized, dead, sometimes sunken, portion of the cambium and bark of branches or the bole of a tree, often...
• CanmakingManufacturing process or processes used to manufacture a can from a basic metal.
• Canned Corn ProductionProcessing of corn into the following product styles: Canned, yellow and white, whole kernel, cream style...
• Canned FishProcessed fish in an airtight container which has been heat-sterilized. The types of fish commonly preserved...
• Canned FruitProcessed fruit in an airtight container which has been heat-sterilized.
• Canned Meat ProcessorOperation which prepares and cans meats (stew, sandwich spreads, or similar products), alone or in...
• Canned Meats ProcessingPreparing and canning meats (stew, sandwich spreads, or similar products), alone or in combination with other...
• Canned Motor PumpPump with interconnected cavity housings, motor rotors, and pump casing. In a canned motor pump, the motor...
• Canned Onion ProcessingProcessing of onions into the following product styles: Canned, frozen, and fried (canned), peeled, whole...
• Canned SeafoodProcessed seafood in an airtight container which has been heat-sterilized.
• Canned VegetableProcessed vegetable in an airtight container which has been heat-sterilized.
• CannibalismConsumption of the flesh of an animal by another animal of the same kind
• CannulaA special tube designed for placing drugs into the udder through the teat end and streak canal.
• Canola OilOil from the plants Brassica napus, Brassica rapa, Brassica juncea, Sinapis alba, or Sinapis arvensis and...
• Canopied LandscapeThe type of visual landscape to be found under an extensive, continuous crown cover of trees-as within a...
• Canopy1. Canopy refers to the tree cover in an urban setting. Canopy size is an important determinant of a city's...
• Canopy Height ModelingStand or Canopy Height (SH) describes the average height of the top of the vegetated canopy. SH estimates are...
• Cap1. A fairly impermeable seal, usually composed of clay-type soil or a combination of clay soil and synthetic...
• cap and tradeAn environmental policy tool that controls large amounts of emissions from a group of sources. Cap and trade...
• Cap and Trade System1. A policy approach for controlling large amounts of emissions from a group of sources. The approach first...
• Cap (Discharge)Total amount of nutrients or sediments allowed to be discharged into a given water body. The cap is the...
• Cap load1. The maximum amount of nutrients and sediments that can be allowed to flow into a waterway and still have...
• Cap Load AllocationBased on each tributary's nutrient and sediment input to the Bay, the total Chesapeake Bay pollution load is...
• Cap load allocationsBased on each tributary's nutrient and sediment input to the Bay, the total Chesapeake Bay pollution load is...
• Capability1. The intrinsic ability (i.e., ability unaltered by any level of potential, future human management...
• Capable FaultAn active fault that is judged capable of producing macroearthquakes and exhibits one or more of the...
• CapacitorDevice for accumulating and holding a charge of electricity and consisting of conducting surfaces separated...
• Capacitor TypeAre as follows:(1) Small capacitor means a capacitor which contains less than 1.36 kg (3 lbs.) of dielectric...
• Capacity1. The institutional, organizational, technical and financial ability to address issues. Used in the context...
• Capacity Assurance Plan1. A plan which assures that a state has the ability to treat and dispose of hazardous wastes generated...
• Capacity Factor1. The ratio of the electrical energy produced by a generating unit for a given period of time to the...
• Capacity Utilization RateRatio between the average annual net generation of power by the facility (in MWh) and the total net...
• Capacity Utilization RatingTotal MWh production of an electric generating unit over a calendar year divided by the product of the number...
• Cape FearThe coastal drainage and associated waters from Browns Inlet to and including the Cape Fear River Basin...
• Capillary Action1. The movement of water through very small spaces due to molecular forces.
• Capillary ArrayGel-filled silica capillaries used to separate fragments for DNA sequencing. The small diameter of the...
• Capillary Electrophoresis1. An electrophoresis procedure, in which a sample is introduced into a capillary tube and the components are...
• Capillary forceAdhesive force that holds a fluid in a capillary or a pore space. Capillary force is a function of the...
• capillary forces1. Interfacial forces between immiscible fluid phases, resulting in pressure differences between the two...
• Capillary Fringe1. The zone immediately above the water table within which the water is drawn by capillary forces (fluid is...
• capillary suctionThe process whereby water rises above the water table into the void spaces of a soil due to tension between...
• Capital Cost1. The total cost to install a control measure on a source. Often, the capital cost is paid for by amortizing...
• Capital CostsCosts (usually long-term debt) of financing construction and equipment.
• Capital Expenditure1. Expenditure for a physical or operational change to an existing facility which exceeds the product of the...
• Capital FacilitiesPhysical facilities used in the production, transmission, and distribution of water.
• Capital FacilityPhysical facilities used in the production, transmission, and distribution of water.
• Capital Improvement (Expense)Funds required for the future purchase, repair or alteration to or for an asset, structure or major pieces of...
• Capital Improvement PlanThese plans identify and prioritize capital project needs and equipment; including purchases, schedules and...
• Capital Improvement Program PlanA plan that projects and assesses which projects (including asset improvements, repairs, replacements and...
• Capital PlanningCapital Planning involves the processes for ensuring that appropriate investments are selected for capital...
• Capital Recovery Factor1. A formula used to amortize the capital cost into the annualized capital component that is part of the...
• Capital Reserve ContributionFunds set aside to fund capital improvements (i.e., future purchase, repair and/or alteration to or for an...
• Capital Shadow PriceAccounts for the social value of displacing private capital investments. For example, when a public project...
• CapitalistA person who participates in a free market system, where individuals are able to invest and participate in...
• CappingA technology to address contaminated sediment which places clean sand or gravel over the contaminated...
• Capping InversionAn elevated inversion layer that caps a convective boundary layer, keeping the convective elements from...
• Capping TechnologyA technology to address contaminated sediment which places clean sand or gravel over the contaminated...
• Capra.Any of numerous agile, hollow-horned RUMINANTS of the genus Capra, in the family Bovidae, closely related to...
• Caprine Arthritis Encephalitis VirusA species of LENTIVIRUS, subgenus ovine-caprine lentiviruses ( LENTIVIRUSES, OVINE-CAPRINE), closely related...
• Caprine Arthritis-EncephalitisViral disease of goats resulting in symptoms of arthritis, lameness, joint problems and pneumonia.
• CaprockA hard impervious rock or stratum of rock above another layer, often oil or gas bearing
• Caprolactam By-Product Ammonium Sulfate Manufacturing PlantAny plant which produces ammonium sulfate as a by-product from process streams generated during caprolactam...
• CapsuleAn envelope of loose gel surrounding a bacterial cell which is associated with the virulence of pathogenic...
• CaptionAlso called a cutline. The lines of text referring to information identifying a picture or illustration.
• Captive AnimalAnimals living in the non-wild state, such as zoo animals
• Captive Electrolyte BatteryA battery having an immobilized electrolyte (gelled or absorbed in a material).
• Captive InsurerA bona fide insurance or reinsurance company that is established and owned by a parent company or group of...
• Capture and Collection SystemSystem, including duct systems and fans, and, in some cases, hoods, used to collect a contaminant at or near...
• Capture Device1. A hood, enclosure, room, floor sweep, or other means of containing or collecting emissions and directing...
• Capture Efficiency1. The fraction of organic vapors generated by a process that are directed to an abatement or recovery device.
• Capture System1. The collection of components used to capture gases and fumes released from one or more emissions points...
• Capture System EfficiencyPortion (expressed as a percentage) of the pollutants from an emission source that is delivered to an add-on...
• Car Coupling SoundSound which is heard and identified by the observer as that of car coupling impact, and that causes a sound...
• Car Line1. Name denoting a group of vehicles within a make or car division which has a degree of commonality in...
• Car Line Production CostAggregate of the products of:(1) The average U.S. dealer wholesale price for such car line as computed from...
• Car Model TypeUnique combination of car line, basic engine, and transmission class.
• Car Seal1. Seal that is placed on a device that is used either to open a closed valve or close an opened valve so...
• Carapace1. A hard shell covering the back of an animal, such as a crab or turtle.
• CarbacholA slowly hydrolyzed cholinergic agonist that acts at both muscarinic and nicotinic receptors.
• CarbamatesDerivatives of carbamic acid, H2NC(=O)OH. Included under this heading are N-substituted and O-substituted...
• CarbamazepineAn anticonvulsant used to control grand mal and psychomotor or focal seizures. Its mode of action is not...
• Carbamide1. A compound formed in the liver from ammonia produced by the deamination of amino acids. It is the...
• Carbohydrate Metabolic ProcessProcesses concerned with the synthesis, breakdown, and oxidation of carbohydrates in the tissues.
• Carbohydrate Processing InhibitionCarbohydrate Processing Inhibition consists of interference with, or restraint of, activities involved in...
• Carbohydrates1. The largest class of organic compounds, including starch; glycogen; cellulose; polysaccharides; and simply...
• Carbon1. A chemical element that is essential to all living things. Carbon combines with other elements to form a...
• Carbon AbsorberAn add-on control device that uses activated carbon to absorb volatile organic compounds from a gas stream...
• Carbon Adsorber1. One vessel in a series of vessels in a carbon adsorption system that contains carbon and is used to remove...
• Carbon Adsorber Control EfficiencyTotal efficiency of the control system, determined by the product of the capture efficiency and the control...
• Carbon Adsorber VesselOne vessel in a series of vessels in a carbon adsorption system that contains carbon and is used to remove...
• Carbon adsorbersControl devices that remove vapors from an air stream by adsorbing the vapor onto an activated carbon surface.
• Carbon AdsorptionA treatment system that removes contaminants from ground water or surface water by forcing it through tanks...
• Carbon Adsorption SystemSystem consisting of a tank or container that contains a specific quantity of activated carbon. For the...
• Carbon Adsorption TechnologyTechnology supporting the collection of a gas or liquid contaminant onto the surface of a carbon filter...
• Carbon AllotropesThe different physical forms for elemental carbon.
• Carbon blackAn amorphous form of carbon, produced commercially by thermal or oxidative decomposition of hydrocarbons and...
• Carbon Black DepositionCoating the inside of printed circuit board holes by dipping the circuit board into a tank that contains...
• Carbon Black Product1. Carbon black manufactured by the furnace process.
• Carbon Capture and SequestrationCarbon capture and sequestration (CCS) is a set of technologies that can greatly reduce carbon dioxide...
• Carbon Capture and StorageThe process of capturing carbon dioxide (CO2) from an emission source, (typically) converting it to a...
• Carbon Capture and UsageRecycling surplus waste carbon dioxide into fuels and products
• Carbon cycle1. The movement and exchange of carbon through living organisms, the ocean, the atmosphere, rocks and...
• Carbon Dioxide1. A naturally occurring gas, and also a by-product of burning fossil fuels and biomass, as well as land-use...
• Carbon Dioxide EmissionEmission of carbon dioxide which is a colorless, odorless, non-poisonous gas that is a normal part of the...
• Carbon Dioxide Emission ControlA set of technologies and devices for controlling the emission of carbon dioxide into the atmosphere
• Carbon Dioxide Emission RateFor a designated facility, the reported CO2 emission rate of a designated facility used by a designated...
• Carbon Dioxide Equivalent1. Emissions of greenhouse gases are typically expressed in a common metric so that their impacts can be...
• Carbon Dioxide Fertilization1. The enhancement of the growth of plants as a result of increased atmospheric CO₂ concentration. Depending...
• Carbon Dioxide FixationThe process by which carbon dioxide is converted to organic compounds by living organisms, such as through...
• Carbon Dioxide Offset RequirementPower plant carbon dioxide (CO2) offset requirements mandate that electric generators retire CO2 emission...
• Carbon Dioxide Offset RequirementsPower plant carbon dioxide (CO2) offset requirements mandate that electric generators retire CO2 emission...
• Carbon Dioxide PlumeThe extent underground, in three dimensions, of an injected CO2 stream.
• Carbon Dioxide Production WellAny hole drilled in the earth for the primary purpose of extracting carbon dioxide from a geologic formation...
• Carbon Dioxide Production Well FacilityOne or more carbon dioxide production wells that are located on one or more contiguous or adjacent...
• Carbon Dioxide ReceivedCO2 stream that you receive to be injected for the first time into a well on your facility that is covered by...
• Carbon Dioxide Stream1. Carbon dioxide that has been captured from an emission source (e.g., a power plant), plus incidental...
• Carbon fluxThe rate of exchange of carbon between pools (i.e., reservoirs).
• Carbon footprint1. The total amount of greenhouse gases that are emitted into the atmosphere each year by a person, family...
• Carbon Hot Forming OperationHot forming operations which produce a majority, on a tonnage basis, of carbon steel products.
• Carbon intensityThe relative amount of carbon emitted per unit of energy or fuels consumed.
• Carbon KilnKiln or furnace where carbon is regenerated by heating, usually in the presence of steam, after the gold has...
• Carbon Monoxide1. A colorless, odorless, poisonous gas produced by incomplete fossil fuel combustion.
• Carbon Monoxide EliminationRemoval of carbon monoxide from any medium.
• Carbon Monoxide EmissionEmission of carbon monoxide a colorless, odorless gas resulting from the incomplete combustion of hydrocarbon...
• Carbon NanotubeCarbon atoms arranged in a tube-like particle structure where the diameter of the tube is nanoscale.
• Carbon offset1. Emission savings or storage that can be considered to cancel out emissions that would otherwise have...
• Carbon offsetsRepresent a quantity of GHG emissions reductions, measured in metric tons of carbon dioxide-equivalent (CO₂e)...
• Carbon OperationHot forming operations which produce a majority, on a tonnage basis, of carbon steel products.
• Carbon poolThe reservoir containing carbon as a principal element in the geochemical cycle.
• Carbon Process with Mercury RetortsAffected source that includes carbon kilns, preg tanks, electrowinning cells, mercury retorts, and melt...
• Carbon Process Without Mercury RetortsAffected source that includes carbon kilns, preg tanks, electrowinning cells, and melt furnaces, but has no...
• Carbon Regeneration UnitAny enclosed thermal treatment device used to regenerate spent activated carbon. [40 CFR 260.10 (CFR 2013)]
• Carbon Sequestration1. The uptake and storage of atmospheric carbon; for example, in soil and vegetation.
• Carbon Sink1. A pool (reservoir) that absorbs or takes up released carbon from another part of the carbon cycle. For...
• Carbon sinksCarbon reservoirs and conditions that take-in and store more carbon (i.e., carbon sequestration) than they...
• Carbon Steel1. Steel that contains approximately 2 percent or less carbon, 1.65 percent or less manganese, 0.6 percent or...
• Carbon StoragePrevention of the release of carbon to the atmosphere by its storage in living plants (e.g., trees) and...
• Carbon Tetrachloride1. Compound consisting of one carbon atom and four chlorine atoms, once widely used as a industrial raw...
• Carbon Working CapacityMeasured amount of hydrocarbon vapor that can be stored in a given volume of carbon when tested according to...
• Carbonaceous1. Of or containing carbon.
• Carbonaceous Biochemical Oxygen Demand1. The biochemical oxygen demand of carbonaceous sources. This differs from BOD in that BOD measures both...
• Carbonate ReductionMicroorganism reduction of carbonate to methane
• Carbonate Rock1. The product of both biological and chemical systems (e.g., corals formed in reefs, oyster shell banks, or...
• Carbonate-Based MineralAny of the following minerals used in the manufacture of glass: Calcium carbonate (CaCO3), calcium magnesium...
• Carbonate-Based Raw MaterialAny of the following minerals used in the manufacture of glass: Calcium carbonate (CaCO3), calcium magnesium...
• Carbonates1. Salts or ions of the theoretical carbonic acid, containing the radical CO2(3-). Carbonates are readily...
• Carbon-Based NanomaterialConsists of nano-sized particles with carbon atoms arranged in a variety of geometries
• Carbon-Based ResourceThe recoverable fossil fuel (coal, gas, crude oils, oil shale, and tar sands) and biomass that can be used in...
• Carbon-Containing Fuel1. Meaning given in 40 CFR 1065.1001.
• Carbon-Containing ProductEach of the following carbon-containing outputs from a process: The petrochemical, recovered byproducts, and...
• Carbonic acid1. An acid that forms when carbon dioxide dissolves in water. As people add more carbon dioxide to the...
• Carbon-Related Exhaust Emissions1. Meaning given in 40 CFR 600.002. Note that CREE represents the combined mass of carbon emitted as HC, CO...
• CarboxyhemoglobinHemoglobin in which the iron is bound to carbon monoxide(CO) instead of oxygen.
• CarboxylasesAn enzyme that catalyzes decarboxylation or carboxylation.
• Carboxylic AcidsOrganic compounds containing the carboxy group (-COOH). This group of compounds includes amino acids and...
• CarboxysomeOrganelles in some bacteria containing an enzyme involved in carbon fixation and the Calvin Cycle
• CarburetorPart of the fuel system of an internal combustion engine that mixes air with the spray of liquid fuel.
• Carburetor and Choke CleanerProduct designed to remove dirt and other contaminants from a carburetor or choke. “Carburetor and choke...
• Carburetor DepositDeposits formed in the carburetor during operation of a carburetted gasoline engine which can disrupt the...
• Carcinogen1. An agent capable of inducing cancer.
• Carcinogen Effect in OffspringAlteration of any condition or process in an offspring that results from the effect of a carcinogen in a...
• Carcinogen MetabolismThe sum of the chemical and physical changes occurring in tissue and resulting in biodegradation of any...
• Carcinogenesis1. The origin or production of a benign or malignant tumor. The carcinogenic event modifies the genome and/or...
• Carcinogen(ic)An agent capable of inducing cancer.
• Carcinogenic1. Capable of causing cancer.
• carcinogenic or carcinogenCapable of causing cancer. A suspected carcinogen is a substance that may cause cancer in humans or animals...
• Carcinogenic PotentialEstimate of the likelihood that an agent will cause cancer in an organism.
• Carcinogenic Potential Short-Term TestEither any limited bioassay that measures tumor or preneoplastic induction, or any test indicative of...
• Carcinogenic to Humans1. This descriptor indicates strong evidence of human carcinogenicity. It covers different combinations of...
• Carcinogenicity1. The tumor-producing/cancer cell-producing potency of an agent.
• CarcinogensAny substance that can cause or aggravate cancer.
• Carcinoma1. Cancer that begins in the tissues lining or covering an organ.
• CardiacPertaining to the heart
• Cardiac ArrhythmiaAny disturbances of the normal rhythmic beating of the heart or mycardial contraction. Cardiac arrhythmias...
• Cardiac Atrium1. The paired upper chambers of the heart. The left atrium receives oxygenated blood from the pulmonary vein...
• Cardiac ConductionTransfer of an organized electrical impulse across the heart to coordinate the contraction of cardiac...
• Cardiac Diagnostic ProcedureThe study and analysis of the normal or abnormal functioning of the heart using methods such as...
• Cardiac Function StudyThe study and analysis of the normal or abnormal functioning of the heart using methods such as...
• Cardiac Output ControlRegulation of the total volume of blood pumped by the heart over a set period of time, conventionally one...
• Cardiac Valve1. Any of the four heart valves, including the two atrioventricular valves and the two semilunar valves, that...
• Cardiac VentricleThe lower right and left chambers of the heart. The right ventricle pumps venous blood into the lungs and the...
• Cardiopulmonary MortalityDeath due to malfunction of the heart and lungs; also refers to the death rate from these causes.
• CardiotoxicityDamage to the heart or its function secondary to exposure to toxic substances such as drugs used in...
• CardiotoxinAgents that have a damaging effect on the heart. Such damage can occur from alkylating agents, free radicals...
• Cardiovascular ComorbidityCoexistence of two or more disease processes, one of which is associated with the cardiovascular system.
• Cardiovascular DiseaseA non-neoplastic or neoplastic disorder affecting the heart or the vessels (arteries, veins and lymph...
• Cardiovascular EffectsHealth effects related to the heart and circulatory system.
• Cardiovascular System1. The heart and the blood vessels by which blood is pumped and circulated through the body.
• Cardiovascular System MeasurementMeasures of the functions of the human heart and blood vessels
• Cardiovascular System ProcessThe life processes in mammals performed by the system that that contains the heart and the blood vessels and...
• Carduus nutansMusk, or nodding thistle is an aggressive, biennial herb with showy red-purple flowers and painful spiny...
• Caregiver GrandparentGrandparent(s) who have assumed full care of their grandchildren on a temporary or permanent live-in basis. A...
• Carex kobomugiAsiatic sand sedge is a perennial adapted to coastal beaches and dunes and possibly the only Carex species...
• CargoThe freight (goods, products) carried by a ship, barge, train, truck or plane.
• Cargo TankLiquid-carrying tank permanently attached and forming an integral part of a motor vehicle or truck trailer...
• Caribbean Outlying AreasArea = 650 sq.mi.
• Caribbean RegionThe drainage within: (a) the Commonwealth of Puerto Rico; (b) the Virgin Islands of the United States; and...
• CariesThe decay of a tooth, in which it becomes softened, discolored, and/or porous.
• Carnivore1. An animal or plant that feeds on animal tissue or meat.
• Carolina BayPonded, depressional wetlands that occur along the Atlantic coastal plain. [40 CFR 401.11 (CFR 2017)][40 CFR...
• CarotenoidsThe general name for a group of fat-soluble pigments found in green, yellow, and leafy vegetables, and yellow...
• Carpal BoneThe eight bones of the wrist: scaphoid bone; lunate bone; triquetrum bone; pisiform bone; trapezium bone...
• Carpal Tunnel SyndromeA condition caused by compression of the median nerve in the carpal tunnel and characterized especially by...
• CarpelThe female reproductive organs within a flower that enclose and protect the ovules.
• CarpetFinished fabric or similar product intended to be used as a floor covering. This definition excludes...
• Carpet CushionAlso known as carpet underlay, is padding placed beneath carpet to reduce carpet wear caused by foot traffic...
• Carried EquipmentOperator completely bears the weight of the equipment, including the engine.
• Carrier1. The insurance company or the one who agrees to pay the losses. The carrier may be organized as a stock or...
• carrier casingSteel pipe that can be installed in the borehole to prevent borehole collapse or to prevent the well...
• Carrier GasGas with which cover gas is mixed to transport and dilute the cover gas thus maximizing its efficient use...
• Carrier OilOil that may be added to the package to mediate or otherwise enhance the detergent chemical's ability to...
• Carrion1. The rotting flesh of a dead animal.
• Carrot ProcessingProcessing of carrots into the following product styles: Canned and frozen, peeled, whole, sliced, diced...
• Carrying Capacity1. In recreation management, the amount of use a recreation area can sustain without loss of quality.
• Carryout CollectionCollection of solid waste from a storage area proximate to the dwelling unit(s) or establishment.
• Carry-Over Engine FamilyEngine family which undergoes certification using carryover test data from previous model years. See §...
• CartilageA non-vascular form of connective tissue composed of chondrocytes, embedded in a matrix that includes...
• CartographicOf or pertaining to maps.
• Cartographic RecordGraphic representation drawn to scale of selected features of the earth's surface and atmosphere and of other...
• CARTOGRAPHIC RECORDSGraphic representations drawn to scale of selected features of the earth's surface and atmosphere and of...
• Cartridge CollectorType of control device that uses perforated metal cartridges containing a pleated paper or non-woven fibrous...
• Cartridge Filter1. Discrete filter unit containing both filter paper and activated carbon that traps and removes contaminants...
• Cartridge Filtration SystemPressure driven separation device that removes particles larger than 1 micrometer (µm) using an engineered...
• CaryophyllalesDiverse order of flowering plants including cacti and carnivorous plants.
• CAS NoNumeric value identifying a chemical with the Chemical Abstracts Services.
• CAS Registration Number1. A number assigned by the Chemical Abstracts Service to identify a chemical.
• CAS Registry NumberThe Chemical Abstract Service Registry Number (CASRN) is an unique numeric identifier, designed to designate...
• Cascade ImpactorA sampling device used to determine the particle size distribution. Particles are separated and deposited on...
• Cascaded Flare SystemSeries of flares connected to one flare gas header system arranged with increasing pressure set points so...
• Cascading Style SheetsCascading Style Sheets, or CSS, is a feature of HTML that gives both Web site developers and users more...
• Case1. The situation that is the subject of a causal analysis; for example, the case may be an impaired stream...
• Case Conclusion Data SheetThe Case Conclusion Data Sheet (CCDS) is a manual data collection tool HQ implemented in FY 1996 to collect...
• case definition1. A set of standard criteria for deciding whether a person has a particular disease or health-related...
• Case Development InspectionThe case development inspection (CDI) is an intensive investigation that is conducted to gather sufficient...
• Case EvaluationA process in which the parties summarize their case to an impartial "evaluator" who gives an opinion...
• CASE FILESRecords, regardless of media, documenting a specific action, event, person, place, project, or other matter...
• Case Study1. A method for learning about a complex instance, based on a comprehensive understanding of that instance...
• CASE WORKING FILESBackground or support files, such as worksheets, questionnaires, rough notes, calculations, or drafts, used...
• Case-control Study1. An epidemiologic study contrasting those with the disease of interest (cases) to those without the disease...
• cased DP systemA rod system consisting of inner rods and outer drive casing. Also referred to as "dual-tube" DP systems. The...
• Cash ContributionActual non-Federal dollars, or Federal dollars if expressly authorized by Federal statute, that your group...
• CASH CONTRIBUTIONS1. The recipient's cash outlay, including the outlay of money contributed to the recipient or subrecipient by...
• Cash CropAn agricultural crop grown to provide revenue from an off-farm source.
• Cash Disbursement1. Transfer of cash from an SRF to an assistance recipient.
• Cash Draw1. Transfer of cash under a letter of credit (LOC) from the Federal Treasury into the State’s SRF.
• Cash On HandThe amount of cash that is available to the system within a 24 hour period.
• Cash plus Marketable SecuritiesAll the cash plus marketable securities held by the local government on the last day of a fiscal year...
• Casing1. The pipe material placed inside a drilled hole to prevent the hole from collapsing. The two types of...
• Casing OperationOccurring periodically throughout the drilling process starting with the surface casing, intermediate casing...
• Casing-collar locatorAn electromagnetic device (CCL) that usually is run with other logs to record the location of collars or...
• Casinghead Natural GasAssociated natural gas that naturally dissolves out of reservoir fluids during well completion operations and...
• CaskA thick-walled container (usually lead) used to transport radioactive material.
• Caspase ActivationCaspase Activation involves induction of the activity of intracellular cysteine endopeptidase family members...
• Caspase-Dependent ApoptosisAny apoptotic process that involves pathways that activate intracellular proteolytic caspases.
• Caspase-Independent ApoptosisAny apoptotic process that does not involve pathways that activate intracellular proteolytic caspases.
• Cast IronAn iron containing carbon in excess of the solubility in the austentite that exists in the alloy at the...
• Cast MakingMaking the molds used to hold the molten metals, giving the metals its form as they cool.
• Casting1. Pouring molten metal into a mold to produce an object of desired shape.
• Casting-in-PlacePrecasting is a manufacturing procedure whereas casting-in-place is a construction procedure
• Castings“Worm poop” that forms pellets or small piles. Earthworm castings put nutrients back into the soil.
• casual useMining activities that only negligibly disturb BLM lands and resources.
• Casuarina equisetifoliaAustralian pine is a deciduous tree with a soft, wispy, pine-like appearance that can grow to 100 feet or...
• Cat DiseasesDiseases of the domestic cat (Felis catus or F. domesticus). This term does not include diseases of the...
• Catabolic ProcessA Catabolic Process consists of activities of biologic molecules, biologic complexes, or subcellular...
• Catadromous AnimalAn organism which lives in fresh water and goes to the sea to spawn, such as some eels.
• Catadromous fishFish that spend most of their lives in freshwater tributaries but must migrate to salt water to spawn. The...
• CatalogA catalog is a collection of datasets. Data.gov has one catalog for all types of datasets at...
• Catalog PricePrice included in a catalog, price list, schedule, or other form that is regularly maintained by the...
• Catalyst1. (CAT-uh-LIST) A substance that changes the speed or yield of a chemical reaction without being consumed or...
• Catalyst Acid Pre-DipUses rinse water to remove residual solution from a part after the part is processed in an acid bath. The...
• Catalyst ExtractionRemoval of the catalyst using either solvent or physical extraction method.
• Catalyst Isolation and Transport VesselContainer ((e.g., lock and lift hoppers) which is part of the catalytic reforming unit (a refinery process...
• Catalyst Replacement of Stoichiometric ReagentMinimize waste by using catalytic reactions. Catalysts are effective in small amounts and can carry out a...
• Catalytic ConverterAn air pollution abatement device that removes pollutants from motor vehicle exhaust, either by oxidizing...
• Catalytic Cracking1. The refining process of breaking down the larger, heavier, and more complex hydrocarbon molecules into...
• Catalytic Cracking UnitRefinery process unit in which petroleum derivatives are continuously charged; hydrocarbon molecules in the...
• Catalytic Cracking Unit Catalyst RegeneratorOne or more regenerators (multiple regenerators) which comprise that portion of the catalytic cracking unit...
• Catalytic DomainThe region of an enzyme that interacts with its substrate to cause the enzymatic reaction.
• Catalytic HydrocrackingA refining process that uses hydrogen and catalysts with relatively low temperatures and high pressures for...
• Catalytic HydrotreatingA refining process for treating petroleum fractions from atmospheric or vacuum distillation units (e.g...
• Catalytic IncineratorA control device that oxidizes volatile organic compounds (VOCs) by using a catalyst to promote the...
• Catalytic OxidationOxidation facilitated by a catalyst
• Catalytic Oxidizer1. Control system that combusts or oxidizes, in the presence of a catalyst, exhaust gas from a process unit...
• Catalytic ReformingA refining process using controlled heat and pressure with catalysts to rearrange certain hydrocarbon...
• Catalytic Reforming UnitRefinery process unit that reforms or changes the chemical structure of naphtha into higher octane aromatics...
• Catalytic Reforming Unit RegeneratorOne or more regenerators which comprise that portion of the catalytic reforming unit and ancillary equipment...
• Catalytic ResearchResearch that informs and empowers a broader collection of people who seek to protect the environment.
• Catalyze(CAT-uh-LIZE) To act as a catalyst. Or, to speed up a chemical reaction.
• Catalyzed(CAT-uh-LIZED) To be acted upon by a catalyst.
• Catapult Water Brake Tank & Post-Launch Retraction ExhaustDischarge from the water brake and from retracting catapults on aircraft carriers during aircraft launching...
• Catastrophic DefenseCatastrophic Defense involves the development of technological countermeasures (chemical, biological...
• Catastrophic ReleaseMajor uncontrolled emission, fire, or explosion, involving one or more regulated substances that presents...
• Catch Basin1. A depression, trench, or pit, which is a collection point for drainage, either water or spilled oil, that...
• Catch CropA quick growing crop, planted and harvested between two regular crops.
• Catchment NHDPlus IDThe identifier associated with a catchment, as designated by the National Hydrography Dataset Plus (NHDPlus).
• Catchment (Watershed)The incremental drainage area for a linear hydrologic feature found in the National Hydrography Dataset (NHD).
• Catecholamine Synthesis(Synthesis of a) group of sympathetic amines containing a catechol group derived from the amino acid...
• Categorical DataResults obtained where observations or measurements on individuals or samples are stratified according to...
• Categorical Exclusion1. A class of actions which either individually or cumulatively would not have a significant effect on the...
• Categorical Industrial DischargerAn industrial user subject to national categorical pretreatment standards.
• Categorical Industrial User1. An industrial user subject to national categorical pretreatment standards.
• Categorical MeasureA measure that places data into a limited numbers of groups or categories.
• Categorical Pretreatment Standard1. A limitation on pollutant discharges to publicly owned treatment works promulgated by EPA in accordance...
• Categorical pretreatment standards1. Standards specifying the quantity, concentration, or pollutant properties of pollutants that may be...
• Categorical RegressionRegression analysis in which the dependent variable is defined as a category rather than as a count or...
• Categorical Regression AnalysisRegression analysis in which the dependent variable is defined as a category rather than as a count or...
• Categories of Engineering ControlsType of engineering controls required indicates which category(ies) of engineering controls are required...
• CategoryRegulations.gov uses the following categories to group notices, proposed rules, rules, and documents...
• Category 1 Marine VesselA vessel that is propelled by an engine(s) that meets the definition of ‘‘Category 1’’ in 40 CFR part...
• Category 2 Marine VesselA vessel that is propelled by an engine(s) that meets the definition of ‘‘Category 2’’ in 40 CFR part...
• Category 3 Marine Vessel1. For the purposes of this part 80, are vessels that are propelled by engines meeting the definition of...
• CaterpillarWhat a moth or butterfly looks like in the larval stage of its life cycle.
• CatharticCausing evacuation of the bowels; laxative
• Cathode1. (KA-thow-d) The negative pole or electrode of an electrolytic cell or system. The cathode attracts...
• Cathode Ray Tube1. Vacuum tube, composed primarily of glass, which is the visual or video display component of an electronic...
• Cathode Ray Tube CollectorPerson who receives used, intact CRTs for recycling, repair, resale, or donation.
• Cathode Ray Tube ExporterPerson in the United States who initiates a transaction to send used CRTs outside the United States or its...
• Cathode Ray Tube Glass ManufacturerAn operation or part of an operation that uses a furnace to manufacture CRT glass.
• Cathode Ray Tube ProcessingConducting all of the following activities:(1) Receiving broken or intact CRTs; and(2) Intentionally breaking...
• Cathode Ray TubesVacuum tubes, made primarily of glass, which constitute the video display component of televisions and...
• Cathodic Protection1. (ca-THOD-ick) An electrical system for prevention of rust, corrosion, and pitting of metal surfaces which...
• Cathodic Protection TesterPerson who can demonstrate an understanding of the principles and measurements of all common types of...
• Cation1. (CAT-EYE-en) A positively charged ion in an electrolyte solution, attracted to the cathode under the...
• Cation ExchangeA reverseable exchange process, that uses a resin, mineral or other exchange medium, in which one cation is...
• Cation Exchange CapacityThe sum total of exchangeable cations that a soil can adsorb. Expressed in centimoles per kilogram of soil...
• Cationic Polymer1. A polymer having positively charged groups of ions; often used as a coagulant aid.
• Cattle Deep Bedding SystemManure management system in which, as manure accumulates, bedding is continually added to absorb moisture...
• Cattle DiseasesDiseases of domestic cattle of the genus Bos, including diseases of cows, yaks and zebus.
• Cauchy DistributionA continuous probability density distribution which models resonance behavior. It is also known as the...
• Caudal FinCaudal pertains to the tail; denoting a position more toward the tail of an animal, e.g., the tail fin of a...
• CaudoviralesAn order comprising three families of tailed bacteriophages: myoviridae; podoviridae; and siphoviridae.
• CaulkBuilding material which is waterproof and used to join or seal other materials.
• Caulking and Smoothing CompoundSemi-solid materials which are applied by hand application methods and are used to aerodynamically smooth...
• Causal Agent1. The agent that directly induces the effect of concern when intensity and duration of exposure are...
• Causal Analysis1. A method for analyzing the possible causal associations among a set of variables.
• Causal Analysis/Diagnosis Decision Information SystemThe Causal Analysis/Diagnosis Decision Information System, a web-based technical support system for...
• Causal Association1. A relationship between two variables in which a change in one brings about a change in the other.

3,357 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.