Environment terminology · MLC-0121
Environment terms: C (3,357)
- Creosote1. Please see the ATSDR fact sheet for creosote.
- Creosote Treated Railroad TieRailway support ties treated with a wood preservative containing creosols and phenols and made from coal tar...
- Creosote-Borate Treated Railroad TieRailroad ties treated with a wood preservative containing creosols and phenols and made from coal tar oil and...
- Crepuscular AnimalAnimals most awake and active at dawn, dusk or both; includes skunks, oppossum, snakes, mice and some lizards.
- Criminal Action1. Enforcement action reserved for the most serious violations, which can result in fines or imprisonment.
- Criminal ApprehensionCriminal Apprehension involves activities associated with the tracking, arrest, detention, and transportation...
- Criminal EnforcementCriminal enforcement investigates and assists in the criminal prosecution of deliberate or egregious...
- Criminal Investigation & SurveillanceCriminal Investigation and Surveillance includes collecting evidence required to determine responsibility for...
- Criminal LiabilityLegal accountability for illegal (criminal) actions
- Criminal PenaltyCriminal Penalties are federal, state or local fines that may be imposed by a Judge at the sentencing. In...
- Crisis ExemptionExemption authorized under FIFRA section 18, in accordance with §§ 166.40 through 166.53 of this chapter.
- Criteria1. Descriptive factors taken into account by EPA in setting standards for pollutants. For example, water...
- Criteria Air PollutantOne of six common air pollutants determined to be hazardous to human health and regulated under EPA's...
- Criteria Air Pollutants1. A group of very common air pollutants regulated by EPA on the basis of criteria (information on health...
- Criteria, causalCriteria are considerations that are employed to assist judgment concerning causation. Synonyms include...
- Criteria Pollutant1. A pollutant determined to be hazardous to human health and regulated under EPA's National Ambient Air...
- Criteria Pollutant Precursor1. For ozone, nitrogen oxides (NOx), unless an area is exempted from NOx requirements under section 182(f) of...
- Criteria Pollutants1. The 1970 amendments to the Clean Air Act required EPA to set National Ambient Air Quality Standards for...
- Criterion Continuous ConcentrationEstimate of the highest concentration of a material in the water column to which an aquatic community can be...
- Criterion Maximum ConcentrationEstimate of the highest concentration of a material in the water column to which an aquatic community can be...
- Critical areaAn area identified in a watershed or project area as having a significant impact on the impaired use of the...
- Critical Concentration1. An ambient chemical concentration expressed in units of µg/m³ and used in the operational derivation of...
- Critical Condition1. The critical condition can be thought of as the "worst case" scenario of environmental conditions in the...
- Critical Design ConditionsEnvironmental and flow conditions chosen to represent the conditions under which compliance with...
- Critical Effect1. The first adverse effect, or its known precursor, that occurs to the most sensitive species as the dose...
- Critical Emission-Related Component1. Any of the following components:(1) Electronic control units, aftertreatment devices, fuel-metering...
- Critical Emission-Related MaintenanceMaintenance to be performed on critical emission-related components.
- critical environmental concernDescribes an area under BLM management and having special attributes.
- Critical Environmental Concern AreaDescribes an area under BLM management and having special attributes.
- Critical Exposure PathwayAn exposure pathway which either provides the highest exposure levels or is the primary pathway of exposure...
- Critical HabitatA designated area that is essential to the conservation of an endangered or threatened species that may...
- Critical InfrastructurePhysical structures, such as buildings, railways, bridges, or tunnels, that are not readily replaced or...
- Critical Infrastructure Protection1. Critical Infrastructure Protection (CIP) pertains to the proactive activities for protecting critical...
- Critical LoadQuantitative estimate of an exposure to one or more pollutants below which significant harmful effects on...
- critical loadsA quantitative estimate of an exposure to one or more pollutants below which significant harmful effects on...
- Critical Methyl Bromide Use1. Circumstance in which the following two conditions are satisfied:(1) There are no technically and...
- Critical PathA plan that lays out which Research Projects and Research Tasks must be conducted to answer the Science...
- Critical PeriodA period during which hydrologic, temperature, environmental, flow, and other such environmental conditions...
- critical pollutantsSubstances that persist in Lake Erie waters or bioaccumulate in organisms living in or near Lake Erie waters...
- Critical QuestionsA tool used in the technical modules to help identify the watershed assessment methods that will address the...
- Critical Refrigeration ComponentFor the purposes of § 82.156(i), a component without which industrial process refrigeration equipment will...
- Critical Stock AllowanceRight granted by this subpart to sell one (1) kilogram of class I, Group VI controlled substances from...
- Critical Stock Allowance HolderEntity to which EPA allocates a quantity of critical stock allowances as reflected under § 82.8(c), or who...
- Critical Study1. The study that contributes most significantly to the qualitative and quantitative assessment of risk. Also...
- Critical to SafetyThose specific tasks within an operation with hazard(s) characterized with an extreme or high level of...
- Critical Use1. Critical use means a circumstance in which the following two conditions are satisfied: (1) There are no...
- Critical Use AllowancePrivilege granted by this subpart to produce or import one (1) kilogram of methyl bromide for an approved...
- Critical Use Allowance for Post-harvest UsesPrivilege granted by this subpart to produce or import one (1) kilogram of methyl bromide solely for an...
- Critical Use Allowance for Pre-Plant UsesPrivilege granted by this subpart to produce or import one (1) kilogram of methyl bromide solely for an...
- Critical Use Allowance HolderEntity to which EPA allocates a quantity of critical use allowances as reflected in § 82.8(c) or who receives...
- Critical Use and Line Sealer MaskantTemporary coating, not covered under other maskant categories, used to protect selected areas of aerospace...
- Critical Use Exemption LocationGeographic area (such as a state, region, or the entire United States) covered by an application for a...
- Critical UsesCritical use means a circumstance in which the following two conditions are satisfied: (1) There are no...
- Critical Value1. Smallest measured amount or concentration of analyte in a sample that gives rise to a Type I error...
- Criticality AnalysisAn integration method similar to the State Space method in that it measures distance from a reference state...
- Crocidolite1. Blue Asbestos
- Cronartium ribicolaThe rust fungus Cronartium ribicola, native to Asia, has become one of the most important diseases of forests...
- Crop AdvisorAny person who is assessing pest numbers or damage, pesticide distribution, or the status or requirements of...
- Crop by Cultivation PracticeOrganization of crops by the methods used to grow them.
- Crop by Resistance TypeCrops organized by their ability to withstand diseases, insects, or agricultural treatments.
- Crop Consumptive UseThe amount of water transpired during plant growth plus what evaporated from the soil surface and foliage in...
- Crop ContaminantLiving organisms or derivates (e.g. viruses, bacteria, fungi, and mammal and bird antigens) in crops that can...
- Crop InsuranceA risk management tool available to agricultural producers....policies for more than 100 crops.
- Crop markslines printed showing the dimensions of the final printed page. These marks are used for final trimming.
- Crop ProductionIndustries in the Crop Production subsector grow crops mainly for food and fiber. The subsector comprises...
- Crop residue1. Organic residue remaining after the harvesting and processing of a crop.
- Crop Rotation1. A system of farming in which a regular succession of different crops are planted on the same land area, as...
- Cropland1. Currently being tilled to produce a crop for harvest
- Cropping (photo)to trim an image to a size that best enhances the contents or to make it fit into the allocated space in the...
- Cross ConnectionAny actual or potential connection between a drinking (potable) water system and an unapproved water supply...
- Cross ContaminationThe movement of underground contaminants from one level or area to another due to invasive subsurface...
- Cross Flow TurbineTypically has two or three blades mounted along a vertical shaft to form a rotor; the kinetic motion of the...
- Cross PollinationFertilization of a plant with pollen from another plant. Pollen may be transferred by wind, insects, other...
- Cross ReactionA molecular interaction between a ligand molecule and a receptor molecule, where the ligand and receptor are...
- cross reactivityThe potential for constituents that are not the target compound to be detected as the target compound by an...
- Cross Recovery FurnaceFurnace used to recover chemicals consisting primarily of sodium and sulfur compounds by burning black liquor...
- Cross VaneUsed to provide grade control, keep the thalweg in the center of the channel, and protect the stream bank. A...
- Cross-Agency InitiativesOMB-sponsored initiatives such as E-Gov initiatives, Line of Business (LOB) initiatives, and other...
- Crosscheck ProgramAn arrangement for laboratories to perform measurements from test samples prepared from a single homogeneous...
- Cross-Cutter Federal Laws and Executive OrdersFederal statues and implementing regulations that address the federal responsibility for protecting and...
- Cross-cutting groupIn EMAP's Integration and Assessment section, one group of scientific and administrative personnel headed by...
- Cross-Cutting ResearchResearch in which two or more agencies participate.
- Cross-holeGeophysical methods carried out between boreholes (see also tomography).
- Cross-Linked PolymerPolymers that have extensive cross-linking between polymer chains. Generally insoluble in solvents.
- Crosslinker1. Cross-linking reagents which contain two or more reactive ends that can attach to specific functional...
- Cross-Linking ReactionReaction which connects polymeric chains, used in making thermoset plastics
- Cross-Media Electronic Reporting Rule1. Defines the standards for electronic reporting to EPA.
- Crosspipe1. A pipe or small bridge for drainage under a road or structure.
- CrossplotA term used in log analysis for a plot of one parameter versus another, usually two different types of logs...
- Cross-Pollutant TradingTrading across two different pollutant parameters when equivalent mass loads of the different parameters can...
- CROSS-REFERENCEIn files management, a finding aid, such as OF 21, directing a user from one place in a file to another when...
- Cross-referencingEPA guidance (White Paper 2) allows permits to incorporate applicable requirements into the permit by...
- Cross-Rod Solvent Cleaning MachineBatch solvent cleaning machine in which parts baskets are suspended from “cross-rods” as they are moved...
- Cross-Sectional Area1. Wet area of a waterbody normal to the longitudinal component of the flow.
- Cross-Sectional DataObservations collected on subjects or events at a single point in time.
- cross-sectional study1. A study in which a sample of persons from a population are enrolled and their exposures and health...
- Cross-State Air PollutionThe total pollution in any area forms from the combination of air pollution from local emissions sources and...
- Cross-TalkDescribes the process inside a cell that occurs when the same signal is shared by two or more signaling...
- Cross-Valley Wind SystemA thermally driven wind that blows during daytime across the axis of a valley toward the heated sidewall.
- Crowd GateA motorized or manual gate at the end of the holding pen that may be moved forward to guide cows toward the...
- Crown1. Steel or aluminum coverings such as bottle caps and jar lids for containers other than can ends.
- Crown Fire1. Fire that advances from top to top of trees or shrubs more or less independent of a surface fire, and...
- Crown Rust of OatsA disease of oats and other grasses, characterized by orange or black spores made by a the rust fungus...
- Cr(T)Total chromium.
- Crucible FurnaceMelting furnaces usually used to melt smaller amounts of nonferrous metals, which can then be poured directly...
- Crude oil1. A mixture of hydrocarbons that exist in liquid phase in underground reservoirs and remain liquid at...
- Crude Oil ProductionThe lifting of oil to the surface and processing it to remove impurities.
- Crude Oil Production Source Category1. Crude oil production, which includes the well and extends to the point of custody transfer to the crude...
- Crude Petroleum PipelineCrude oil and product pipelines used to transport crude oil and petroleum products, respectively (including...
- Crumb Rubber1. Refers to ground rubber pieces the size of sand or silt used in rubber or plastic products, or processed...
- CrushTo reduce the size of nonmetallic mineral material by means of physical impaction of the crusher or grinding...
- Crushed StoneOf the total crushed stone produced in 2010, about 68% was limestone and dolomite; 13%, granite; 7%...
- Crusher1. Machine used to crush any metallic mineral and includes feeders or conveyors located immediately below the...
- Crusher Rated CapacityRated capacity in tons per hour of a crusher, grinding mill, bucket elevator, bagging operation, or enclosed...
- CrushingTo reduce the size of nonmetallic mineral material by means of physical impaction of the crusher or grinding...
- Crushing and Screening EquipmentCrushers, grinders, mills, screens and conveying systems used to crush, size, and prepare for packing...
- CrustaceaA large subphylum of mostly marine ARTHROPODS containing over 42,000 species. They include familiar...
- CrustaceanAquatic arthropods (invertebrates) that have gills, joined legs and exterior skeletons. Crabs, shrimps...
- CrustaceansAquatic arthropods (invertebrates) that have gills, joined legs and exterior skeletons. Crabs, shrimps...
- crustal tiltingThe uplifting movement of the earth's crust.
- Crustose Coralline AlgaeCrustose coralline algae are red algae of the division Rhodophyta. They are very important members of a reef...
- Crustose LichenCrustose lichens are the most common form present in Everglades National Park and in other subtropical and...
- CryogenRefrigerant used to obtain sub-ambient temperatures in the pre-concentrator and/or the GC oven. Typical...
- CryogenicPertaining to or causing the production of low temperatures
- Cryogenic Flexible PrimerPrimer designed to provide corrosion resistance, flexibility, and adhesion of subsequent coating systems when...
- Cryoprotective CoatingCoating that insulates cryogenic or subcooled surfaces to limit propellant boil-off, maintain structural...
- Cryosphere1. One of the interrelated components of the Earth's system, the cryosphere is frozen water in the form of...
- Cryptomonad(Belonging to the class) of Eukaryota (traditionally algae), characterized by biflagellated cells and found...
- CryptophytaA class of EUKARYOTA (traditionally algae), characterized by biflagellated cells and found in both freshwater...
- Cryptosporidiosis1. Intestinal infection with organisms of the genus Cryptosporidium. It occurs in both animals and humans...
- Cryptosporidium1. A protozoan microbe associated with the disease cryptosporidiosis in man. The disease can be transmitted...
- Cryptosporidium parvum1. Cryptosporidium parvum, a single-celled animal, i.e., a protozoa, is an obligate intracellular parasite...
- Crystalline PlasticsPlastics such as polypropylene which have a high degree of internal order.
- Crystalline RockRock (igneous or metamorphic) consisting wholly of crystals or fragments of crystals.
- CrystallizationThe formation of mineral crystals during the cooling of a magma or by precipitation from a solution.
- CSAPR NOX Ozone Season Expanded Group 2 AllowanceCSAPR NOX Ozone Season Group 2 allowance allocated for a control period after 2022 under subpart EEEEE of...
- CSAPR NOx Ozone Season Group 1 Trading ProgramMulti-state NOx air pollution control and emission reduction program established in accordance with subpart...
- CSAPR NOX Ozone Season Group 2 Allowance1. Limited authorization issued and allocated or auctioned by the Administrator under subpart EEEEE of this...
- CSAPR NOx Ozone Season Group 3 Secondary Emissions LimitationFor a CSAPR NOX Ozone Season Group 3 unit to which such a limitation applies under § 97.1025(c)(1) for a...
- CSAPR NOX Ozone Season Group 3 Trading ProgramMulti-state NOX air pollution control and emission reduction program established in accordance with subpart...
- CSAPR NOX Ozone Season Original Group 2 AllowanceCSAPR NOX Ozone Season Group 2 allowance other than a CSAPR NOX Ozone Season Expanded Group 2 allowance. [40...
- CSAPR SO2 Group 2 Trading ProgramMulti-state SO2 air pollution control and emission reduction program established in accordance with subpart...
- CSOA combined sewer overflow (CSO) refers to a discharge of untreated wastewater from a combined sewer system at...
- CTThe product of "residual disinfectant concentration" (C) in mg/l determined before or at the first customer...
- CTcalcThe product of "residual disinfectant concentration" (C) in mg/l determined before or at the first customer...
- CubicAn effect is a function of a measure raised to the third power.
- Cubic Feet per Minute1. A measure of the volume of a substance flowing through air within a fixed period of time. With regard to...
- Cubic Foot of ProductionCubic feet or cubic meters of logs from which bark is removed.
- Cubic Meter of ProductionCubic feet or cubic meters of logs from which bark is removed.
- CueIn animal behavior, a signal fom one animal which acts as a stimulus to elicit a behavioral response in...
- CuesThe alternative responses to questions that increase or decrease in intensity in an ordered fashion. The...
- cuestaAn asymmetric landform that consists of a steep slope and a more gentle dip (or back) slope.
- CUI Executive AgentNational Archives and Records Administration (NARA), which implements the executive branch-wide CUI Program...
- CullTo remove a cow from the herd. Culling reasons in clued voluntary culling of cows for low milk production, or...
- Cull CowA cow having been identified to be removed from the herd or having recently left.
- Cullet1. Crushed glass.
- Cullet WaterWater which is exclusively and directly applied to molten glass in order to solidify the glass.
- CulmThe jointed stem of a grass that supports the leaves and elevates the flowering structure.
- Culm BankSurface mine where coal is recovered from previously mined coal.
- CultivarCultivated variety.
- Cultivated CroplandCultivated cropland comprises land in row crops or close-grown crops and also other cultivated cropland, for...
- Cultural CompetencyA set of academic and interpersonal skills that allow individuals to increase their understanding and...
- Cultural DiversityCoexistence of numerous distinct ethnic, racial, religious, or cultural groups within one social unit...
- Cultural environmentThe part of the environment which represents man-made features (e.g. roads, buildings, canals, bridges) as...
- Cultural Eutrophication1. Acceleration by man of the natural aging process of bodies of water.
- Cultural GoodsThose goods with a value determined by their symbolic content, but with uncertain economic value
- Cultural Landscape1. A geographic area, including both cultural and natural resources and the wildlife and domestic animals...
- Cultural Resource1. Natural or manmade features having cultural or historical significance, such as structures, graves...
- cultural resourcesNatural or manmade features having cultural or historical significance, such as structures, graves, religious...
- Cultural ServiceNonmaterial benefits people obtain from ecosystems through spiritual enrichment, cognitive development...
- Cultural ServicesThe nonmaterial benefits people obtain from ecosystems through spiritual enrichment, cognitive development...
- Cultural UseIf a waterbody is assessed for a Cultural use this means it is unique to the customs and culture of a...
- Cultural/Historical ResourcesCultural resources include buildings, objects, features, locations that a community values; historical...
- CultureIn microbiology, a population of microorganisms in a growth medium or the act of growing bacteria in media...
- Culture MediaAny liquid or solid preparation made specifically for the growth, storage, or transport of microorganisms or...
- Culture (method)1. Preferred and definitive method (gold standard) to assess the viability of a target organism, in addition...
- Cultures and StocksInfectious agents and associated biologicals including cultures from medical and pathological laboratories...
- Culvert1. A pipe or small bridge for drainage under a road or structure.
- CumberlandThe Cumberland River Basin. Kentucky, Tennessee. Area = 17700 sq.mi.
- Cumulative Assessment GroupA subset of chemicals selected from a common mechanism group for inclusion in a refined quantitative estimate...
- Cumulative Co-BenefitAdditive collateral benefit
- Cumulative Crusher CapacityCumulative rated capacity of all initial crushers that are part of the plant.
- Cumulative distributionA means of representing the variation of some attribute by giving running totals of the resource with...
- Cumulative Distribution Function1. Cumulative distribution functions are particularly useful for describing the likelihood that a variable...
- cumulative doseThe total dose resulting from repeated exposures of ionizing radiation to an occupationally exposed worker to...
- Cumulative Ecological Risk Assessment1. A process that involves consideration of the aggregate ecological risk to the target entity caused by the...
- Cumulative Effect1. Effects on the environment that result from the incremental effects of the action when added to the...
- Cumulative EffectsThe combined environmental effects over time of multiple land use activities, typically in a watershed area.
- Cumulative Energy Requirements AnalysisA process to quantify the primary energy requirement for products and services from a lifecycle perspective.
- Cumulative Exposure1. The sum of exposures of an organism to a pollutant over a period of time.
- Cumulative exposure assessment1. Generally evaluates combined exposure to multiple stressors via multiple exposure pathways.
- Cumulative FrequencyIn a frequency distribution, the number or proportion of cases or events with a particular value or in a...
- Cumulative Frequency CurvePlot of the cumulative frequency rather than the actual frequency for each class interval of a variable. This...
- Cumulative Health Impact1. The concept of cumulative impacts takes into account all activities and their combined effect over time...
- cumulative impactThe collective impacts of several operations involving human activities, including mining, grazing, farming...
- Cumulative Impacts -The impact on the environment that results from the incremental impact of the action when added to other...
- Cumulative Pollutant Loading RateMaximum amount of an inorganic pollutant that can be applied to an area of land.
- Cumulative Risk1. The risk of a common toxic effect associated with concurrent exposure by all relevant pathways and routes...
- cumulative risk assessment1. An analysis, characterization, and possible quantification of the combined risks to health or the...
- Cumulative Toxicity1. Adverse effects of repeated exposures occurring as a result of prolonged action or increased concentration...
- Cumulative Working Level MonthsThe sum of lifetime exposure to radon working levels expressed in total working level months.
- CumulonimbusA cloud type that is dense and vertically developed and is associated with rain (particularly of a convective...
- Cumulus1. Detached clouds, generally dense and with sharp outlines, showing vertical development in the form of...
- Cupaniopsis anacardioidesCarrotwood is a fast-growing evergreen tree that grows to a height of about 35 feet. The leaves are large and...
- CupolaVertical cylindrical shaft furnace that uses coke and forms of iron and steel such as scrap and foundry...
- Cupola ShutdownPeriod beginning when the last of the molten metal is tapped from the cupola's primary tap hole and ending...
- Cupola StartupCommencement of activities needed to take a banked cupola or a cupola that has had the bottom dropped back...
- Curb CollectionCollection of solid waste placed adjacent to a street.
- curb extensionA section of sidewalk designed to contain soils and vegetation to filter runoff, reduce velocities and in...
- Curb Stop1. A water service shutoff valve located in a water service pipe near the curb and between the water main and...
- Curb Weight1. The weight of a vehicle with standard equipment and fluids, but not including options, driver, passengers...
- Curb-Idle1. For manual transmission code light-duty trucks, the engine speed with the transmission in neutral or with...
- Curbside Collection1. A method of collecting recyclable materials at individual homes or places of business by municipal or...
- Cure VolatilesReaction products which are emitted during the chemical reaction which takes place in some coating films at...
- Cured FoamFlexible polyurethane foam with fully developed physical properties. A period of 12 to 24 hours from pour is...
- Cured FoodFood that has been treated with salt or nitrate or nitrite to preserve it. A very old method of food...
- Curie1. A measure of radioactivity. One Curie of radioactivity is equivalent to 3.7 x 1010 or 37,000,000,000...
- Curing"Setting" the concrete. The fundamental factors are temperature, moisture, and time. Radiant heat, steam, hot...
- Curing AreaArea in a slabstock foam production facility where foam buns are allowed to fully develop physical properties.
- Curing Oven1. Device that uses heat to dry or cure the coating(s) applied to large appliance parts or products.
- Current1. The segment of a stream, river, or other waterbody that moves with a velocity much greater than the...
- Current AssetCash or other assets or resources commonly identified as those which are reasonably expected to be realized...
- Current channeling/gatheringChanneling is a restriction of current flow due to an insulating barrier or narrowing of a conductor. Current...
- Current Closure Cost EstimateMost recent of the estimates prepared in accordance with § 267.142 (a), (b), and (c).
- Current densityA measure of current flow through a given (oriented) area [Amperes/ m2].
- Current DischargeVolume, composition, and location of an applicant's discharge at the time of permit application.
- Current human exposure is under controlSites are assigned to this category when assessments for human exposures indicate there are no unacceptable...
- Current human exposures is not under controlSites are assigned to this category when 1) contamination has been detected at a site at an unsafe level, and...
- Current Human Exposures Under Control - More Information Needed1. The event by which the State or EPA completes and Environmental Indicators (EI) Evaluation verifying that...
- Current Human Exposures Under Control - Not Under Control1. The event by which the State or EPA completes and Environmental Indicators (EI) Evaluation verifying that...
- Current Human Exposures Under Control - Under Control1. The event by which the State or EPA completes and Environmental Indicators (EI) Evaluation verifying that...
- Current LawCurrent law refers to the Asbestos Hazard Emergency Response Act of 1986 (AHERA). (Public Law 99-519)
- Current LiabilityObligations whose liquidation is reasonably expected to require the use of existing resources properly...
- Current MeanderA current that deviates from a straight line flow, which is often the result of incursion by lateral currents...
- Current Ozone NAAQSMost recently promulgated ozone NAAQS at the time of application of any provision of this subpart.
- Current Pesticide ProductionAmount of planned production in the calendar year in which the pesticides report is submitted, including new...
- Current Plugging and Abandonment Cost EstimateMost recent of the estimates prepared in accordance with § 144.62(a), (b), and (c) of this chapter.
- Current Plugging Cost EstimateMost recent of the estimates prepared in accordance with § 144.62 (a), (b) and (c).
- CURRENT RECORDSRecords necessary to conduct the current business of an office and therefore generally maintained in office...
- Current Use PesticidePesticides officially registered with EPA for use in United States.
- Current Visibility ConditionAverage of the five annual averages of individual values of daily visibility for the most recent period for...
- Currently in UseA tank that contains a regulated substance and is being used to dispense product.
- Currently Valid Certificate of ConformityCertificate of conformity for which the current date is within the effective period as specified on the...
- Curriculum & Training ResourcesInstructional content, materials, resources, and processes to facilitate the attainment of educational...
- CurtailmentReduction of output (ramp down or shut down) that is a generation unit's response to a grid operator's...
- CUSTODYGuardianship, or control, of records, including both physical possession (physical custody) and legal...
- Custody MeterMeter where natural gas or hydrocarbon liquids are measured for sales, transfers, and/or royalty...
- Custody Meter AssemblyAssembly of fugitive emissions components, including the custody meter, valves, flanges, and connectors...
- Custody Transfer1. Transfer of produced petroleum and/or condensate, after processing and/or treating in the producing...
- Custom BlenderAny establishment which provides the service of mixing pesticides to a customer's specifications, usually a...
- Custom BlendingService of mixing pesticides to a customer's specifications, usually a pesticide(s)-fertilizer(s)...
- Custom BrokersCustom brokers are licensed by U.S. Customs and Border Protection (CBP) to conduct CBP business on behalf of...
- Custom Oligonucleotide MicroarrayArray of many thousands of tiny oligonucleotide "probes" on a silicon wafer prepared to customer...
- Custom ToolAny piece of software that performs one or more functions and that's been specifically built for a specific...
- Custom-Built Process EquipmentIndustrial process equipment or any of its components cannot be purchased and/or installed without being...
- Customer1. Any person to whom a manufacturer, importer, or processor directly distributes any quantity of a chemical...
- Customer ClassA group of customers (residential, commercial, industrial, wholesale, and so on) defined by similar costs of...
- Customer Energy Management DeviceA device that can control other energy devices such as thermostats, lighting, direct load control devices, or...
- Customer Premises EquipmentTelephone terminal devices, such as handsets and private branch exchanges (PBXs), located on the customer’s...
- Customer ReturnAny aluminum product which is returned by a customer to the aluminum company that originally manufactured the...
- Custom-Molded DeviceHearing protective device that is made to conform to a specific ear canal. This is usually accomplished by...
- Customs Territory of the United StatesThe 50 States, the District of Columbia, and Puerto Rico.
- Cut-and-Fill1. An earth-moving process that entails excavating part of an area and using the excavated material for...
- Cutaneous EliminationThe discharge of substances from the blood supply to the glands of the skin and excretion in the sweat and...
- Cutaneous FungusSuperficial fungus infecting the skin.
- Cutie-PieAn instrument used to measure radiation levels.
- CutinA waxy hydrophobic substance deposited on the surface of plants, composed of complex long chain fatty esters...
- Cut-in, or Jambing, ClearcoatFast-drying, ready-to-spray clearcoat applied to surfaces such as door jambs and trunk and hood edges to...
- CUTOFFBreaking, or ending, files at regular intervals, usually at the close of a fiscal or calendar year, to permit...
- Cut-off SawPower tool that, when cutting, generates airborne metal particles.
- Cutout DeviceDevices which vary the exhaust system gas flow so as to discharge the exhaust gas and acoustic energy to the...
- Cutting StationUnit from which substrate is collected at the outlet of a web coating line.
- CuttingsSpoils left by conventional drilling with hollow stem auger or rotary drilling equipment.
- CWAThe Clean Water Act (CWA) establishes the basic structure for regulating discharges of pollutants into the...
- CWA 303d Priority RankingCWA 303(d) priority for developing a TMDL (i.e. High, Medium, Low).
- CWA Hazardous Substance Responsecontainment, removal, remediation, neutralization, source control, mechanical recovery, bioremediation, or...
- CWA Recognition Award ApplicationCompleted questionnaire, nomination form, or other documentation submitted to or by the States, EPA Regions...
- CWA Section 102 PermittingApplications for general, special, emergency, and research permits under section 102 of the Act may be filed...
- CWA section 303(d)Section of the Clean Water Act under which states, territories, and authorized tribes are required to develop...
- CWA section 305(b)Section of the Clean Water Act under which states are required to prepare a report describing the status of...
- CWA section 319Section of the Clean Water Act under which EPA has developed guidelines to help states, territories, and...
- CWA Section 404 PermittingSection 404 of the Clean Water Act (CWA) establishes a program to regulate the discharge of dredged or fill...
- Cyan, Magenta, Yellow and Blackthe four primary printing inks that make up any full color printing job. Also known as the four process...
- CyanidationThe process of extracting gold and silver by leaching with cyanide (CN-). Cyanide, usually added in the form...
- Cyanide A1. Those cyanides amenable to chlorination and is determined by the methods specified in 40 CFR 136.3.
- Cyanide Compounds (1.0)X⁺CN⁻ where X = H⁺ or any other group where a formal dissociation can be made. For example KCN or Ca(CN)₂.
- Cyanide DestructionConversion of cyanide into a less toxic compound through an oxidation reaction.
- Cyanide Drag-out DestructionDipping part in a cyanide oxidation solution (e.g., sodium hypochloride) to prevent cyanide that is “dragged...
- Cyanide FishingA destructive fishing technique in which sodium cyanide or some other cyanide compound is used to stun and...
- Cyanide PlatingPlating processes performed in tanks that use cyanide as a major bath ingredient and that operate at pH of 12...
- Cyanides and Cyanide Compounds1. Inorganic salts of HYDROGEN CYANIDE containing the -CN radical. The concept also includes isocyanides. It...
- Cyaniding RinseGenerated during cyaniding hardening of a part. The part is heated in a molten salt solution containing...
- Cyanoacrylate AdhesiveFast-setting, single component adhesive that cures at room temperature. Also known as “super glue.”
- Cyanobacteria1. A phylum of oxygenic photosynthetic bacteria comprised of unicellular to multicellular bacteria possessing...
- Cyanobacterial Harmful Algal BloomAlgae are natural components of marine and fresh water flora performing many roles that are vital for the...
- Cyanobacterial Toxin1. Toxin or poisonous substance produced by cyanobacteria, particularly by cyanobacterial blooms.
- CyanogenesisThe production of hydrocyanic acid (HCN) by plants.
- CyanolichenA lichen that has cyanobacteria for its primary photobiont.
- CyanosisBluish discoloration, especially of the skin and mucous membranes and fingernail beds
- CyanotoxinCyanotoxins are produced and contained within the cyanobacterial cells (intracellular). The release of these...
- Cyber AttackAn attempt to gain unauthorized access to system services, resources, or information, or an attempt to...
- CyberspaceA term introduced by science fiction author William Gibson in 1984. "Cyberspace" is where human interaction...
- CybridThe viable cell resulting from the fusion of a cytoplast (cytoplasm remaining after the enculeation of a...
- CYCLEThe periodic removal of obsolete copies of vital records and their replacement with copies of current vital...
- Cycle Expected to AttainCycle by which the Assessment Unit is expected to attain its standards (used to indicate whether or not this...
- Cycle First ListedCycle the Assessment Unit and Cause were first included on the 303(d) list.
- Cycle Last AssessedThe cycle the Assessment Unit was last assessed, which can include any conclusions related to this Assessment...
- Cycle Scheduled for TMDLCycle when the jurisdiction anticipates submitting the TMDL for EPA approval.
- Cycle skipIn acoustic-velocity logging, cycle skips are caused by only one of a pair of receivers being triggered by an...
- Cycle StatusThe latest status of the Integrated Reporting cycle.
- Cyclic Fluorinated Greenhouse GasIn the context of fluorinated GHGs, means a fluorinated GHG in which three or more carbon atoms are connected...
- Cyclic Regeneration ReformingCatalytic reforming process characterized by continual batch regeneration of catalyst in situ in any one of...
- CyclomorphosisCyclical changes in form such as seasonal changes in morphology, as seen in some planktoic crustaceans.
- Cyclone1. A large-scale circulation of winds around a central region of low atmospheric pressure, counterclockwise...
- Cyclone Boiler1. Boiler in which electric heating serves as the source of heat. Electric boilers that burn gaseous or...
- Cyclone (Collector)1. Mechanically aided collector that uses inertia to separate particulate matter from the gas stream as it...
- Cyclonic Barrel BurnerCombustion device for waste materials that is attached to a 55 gallon, open-head drum. The device consists of...
- Cyclonic SeparatorMechanical collector that uses centrifugal force to drive particles to the wall of the device,
- Cyclooxygenase InteractionCyclooxygenase Interaction involves temporary non-covalent binding, typically through intermolecular physical...
- CyclophosphamidePrecursor of an alkylating nitrogen mustard antineoplastic and immunosuppressive agent that must be activated...
- Cyclopiazonic AcidA fungal metabolism intermediate. A mycotoxin.
- CyclosystemA system of very small tubules that links the polyps of calcareous colonial hydrozoans,
- Cydia pomonella granulovirusA virus from the baculoviridae family that is used as an insecticide with a narrow host range
- Cydia pomonella granulovirus isolate V22Insecticide against the larvae of the apple codling moth, Cydia pomonella, on pome and stonefruite trees...
- Cylinder ExchangeSystem where emptied gas cylinders are returned by the user to be refilled by the supplier.
- Cylindric map projectionOne of a class of map projections formed by projecting coordinates from the earth's surface onto a cylinder...
- Cylindrical map projectionOne of a class of map projections formed by projecting coordinates from the earth's surface onto a cylinder...
- Cynanchum louiseaeBlack or Louis’ swallow-wort (previously Vincetoxicum nigrum and Cynanchum nigrum) is a perennial, twining...
- Cynanchum rossicumPale or European swallow-wort (previously Vincetoxicum rossicum) is a long-lived perennial, twining...
- CysteineA non-essential sulfur-containing amino acid in humans, related to cystine, Cysteine is important for protein...
- CystineNot considered one of the 20 amino acids, Cystine is a sulfur-containing derivative obtained from oxidation...
- Cytisus scopariusForms dense stands which crowd out native species and destroy wildlife habitat.
- Cytochrome bc ComplexA membrane bound electron transfer protein complex found in all anoxygenic photosynthetic organisms that...
- Cytochrome bf ComplexA membrane bound electron transfer protein complex found in all oxygenic photosynthetic organisms that...
- Cytochrome P4501. A family of cytochromes that are involved in electron transport and oxidative metabolism of drugs and...
- Cytochrome P450 1A1Cytochrome P450 1A1 (512 aa, ~58 kDa) is encoded by the human CYP1A1 gene. This protein is involved in the...
- Cytochromes1. Hemeproteins whose characteristic mode of action involves transfer of reducing equivalents which are...
- Cytokine Degradation ProcessCytokine Degradation consists of conjugation, transport, oxidation, and/or proteolysis of a class of soluble...
- Cytokine Receptor BindingA process that involves the binding of any member of the cytokine family to a cognate cytokine receptor...
- Cytokine Release SyndromeA severe immune reaction characterized by excessive release of cytokines. Symptoms include dyspnea, fever...
- Cytokines1. Non-antibody proteins secreted by inflammatory leukocytes and some non-leukocytic cells, that act as...
- Cytokinesis1. Cleavage of the cytoplasm into daughter cells following nuclear division.
- CytokininsPlant hormones that promote the separation of daughter cells after mitotic division of a parent cell...
- Cytolytic Process1. Any cell death process resulting from rupture of cell membranes and loss of cytoplasm.
- Cytoplasm1. Cytoplasm is the gelatinous liquid that fills the inside of a cell. It is composed of water, salts, and...
- Cytoplasmic and Nuclear ReceptorIntracellular receptors that can be found in the cytoplasm or in the nucleus. They bind to extracellular...
- Cytoplasmic GranuleCondensed area of cellular material that may be bounded by a membrane.
- Cytoplasmic Inheritance1. A property of genes located in mitochondria or chloroplasts (or possibly other extranuclear organelles).
- Cytosensor Microphysiometer AssayA non-animal test method developed in search for a replacement for the Draize rabbit eye test. This assay...
- Cytosine1. A pyrimidine base that is a fundamental unit of nucleic acids.
- Cytoskeletal ModelingSubcellular biological functions, activities, or processes that generate, maintain, or modify macromolecular...
- Cytoskeletal ProcessAny process that takes place on the cellular level, and which results in the assembly or disassembly of...
- Cytoskeletal ProteinA protein that is a structural part of the cytoskeleton. These proteins are involved in cell shape, organelle...
- Cytoskeletal Synthesis InhibitionCytoskeletal Synthesis Inhibition consists of interference with, or restraint of, the activities of enzymes...
- CytoskeletonThe network of filaments, tubules, and interconnecting filamentous bridges which give shape, structure, and...
- CytotoxinSubstances that are toxic to cells; they may be involved in immunity or may be contained in venoms. These are...
- Czochralski ProcessA method of growing large size, high quality semiconductor crystal by slowly lifting a seed crystal from a...
3,357 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.