Environment terminology · MLC-0121

Environment terms: A (2,431)

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• Advanced very high resolution radiometerA five-channel scanning instrument that quantitatively measures electromagnetic radiation, flown on NOAA...
• Advanced waste treatmentWastewater treatment process that includes combinations of physical and chemical operation units designed to...
• Advanced wastewater treatmentAny treatment of sewage that goes beyond the secondary or biological water treatment stage and includes the...
• Advection1. Bulk transport of the mass of discrete chemical or biological constituents by fluid flow within a...
• Advective transportPhysical transport of water and associated concentrations from higher to lower hydraulic potential, exclusive...
• AdventitiaThe outermost covering of organs, blood vessels, and other such structures in the body.
• Adventitious rootRoot structures developing in a location of position where it is not normally expected, such as a root that...
• Adventitious shootShoots growing from a part of a plant, such as a leaf, where they are not expected, forming new plants.
• Adversary adjudicationAdjudication required by statute to be held pursuant to 5 U.S.C. 554 in which the position of the United...
• Adverse ecological effectA change that is considered undesirable because it alters valued (in the general sense) structural or...
• Adverse ecological effects, see Adverse ecological effect
• Adverse effect1. A biochemical change, functional impairment, or pathologic lesion that affects the performance of the...
• Adverse effects dataFIFRA requires a pesticide registrant to submit data to EPA on any studies or other information regarding...
• Adverse environmental impactUndesirable effect on the environment.
• Adverse health effect1. Any effect resulting in anatomical, functional, or psychological impairment that may affect the...
• Adverse health effect (occurrence)Any abnormal, harmful, or undesirable effect (occurrence) on the physical, biochemical, biological, or...
• Adverse health outcomeDeath, permanent or temporary disability or situations requiring an intervention to avoid them
• Adverse impactThe result of an action that clashes with a wanted condition.
• Adverse impact on visibilityFor purposes of section 307, visibility impairment which interferes with the management, protection...
• Adverse outcomeA consequence to an action that leaves recipients in a worse state than before the action
• Adverse outcome pathway1. Model that identifies the sequence or molecular and cellular events required to produce a toxic effect...
• Adverse weather1. Weather conditions that make it difficult for response equipment and personnel to clean up or remove...
• Advertised engine displacementRounded off volumetric engine capacity used for marketing purposes by the motorcycle manufacturer.
• AdviceInformation or assistance provided by the Scientific Integrity Official or any Deputy Scientific Integrity...
• Advising & consultingAdvising and Consulting involves the guidance and consultative services provided by the Federal Government to...
• Advisories, see Advisory
• Advisory1. A non-regulatory document that communicates risk information to those who may have to make risk management...
• Advisory BoardDOD Restoration Advisory Boards and DOE Site-Specific Advisory Boards foster teamwork by bringing community...
• Aegopodium podagrariaGoutweed, also known as bishop's-weed and snow-on-the-mountain, is an herbaceous perennial plant. It is one...
• Aerated lagoonA holding and/or treatment pond that speeds up the natural process of biological decomposition of organic...
• Aeration1. The act of mixing a liquid with air (oxygen).
• Aeration processAny time when ethylene oxide is removed from the aeration unit through the aeration unit vent or from the...
• Aeration roomAny vessel or room that is used to facilitate off-gassing of ethylene oxide at a sterilization facility.
• Aeration room ventPoint(s) through which the evacuation of ethylene oxide-laden air from an aeration room occurs.
• Aeration tankA chamber used to inject air into water.
• Aeration unitAny vessel that is used to facilitate off-gassing of ethylene oxide.
• Aerator1. The screw-on tip of the faucet that determines the flow rate. Aerators are inexpensive to replace and they...
• Aerial photographsPhotographs of the earth, other planetary bodies, or the atmosphere that have been taken from airborne...
• Aerial survey1. Aerial photography, MultiSpectral Scanner, Forward Looking InfraRed (FLIR), and historical aerial...
• Aerobic1. A biological process that occurs in the presence of oxygen.
• Aerobic bacteriaMicroorganisms that require free oxygen, or air, to live, and that which contribute to the decomposition of...
• Aerobic biodegradation"The breakdown of organic contaminants by microorganisms when oxygen is present. Aerobic biodegradation also...
• Aerobic biodegradation technologyTechnology using the decomposition of a substance into more elementary compounds by the action of...
• Aerobic decompositionThe breakdown of molecules into simpler molecules or atoms by microorganisms in an environment containing...
• Aerobic digestion1. A biochemical process which uses microorganisms in the presence of oxygen to decompose organic matter.
• Aerobic fermentationFermentation processes that require the presence of oxygen.
• Aerobic fixed film biological treatmentBiological treatment process that uses a medium such as rock, plastic, wood, or other natural or synthetic...
• Aerobic microorganismAny microscopic organism such as yeast, bacteria, fungi, etc. able to live, grow, or take place only where...
• Aerobic process1. Life processes that require, or are not destroyed by, the presence of oxygen.
• Aerobic respiration1. "Process whereby microorganisms use oxygen as an electron acceptor to generate energy." - National...
• Aerobic suspended growthBiodegradable organic compounds in wastewater are consumed by microorganisms in the presence of oxygen. The...
• Aerobic treatment1. Process by which microbes decompose complex organic compounds in the presence of oxygen and use the...
• Aerobic treatment unit1. A mechanical wastewater treatment unit that provides secondary wastewater treatment for a single home, a...
• Aerodynamic diameterThe diameter of a sphere with unit density that has aerodynamic behavior identical to that of the particle in...
• Aeromonas salmonicidaA species of gram-negative bacteria, in the family Aeromonadaceae. It is strictly parasitic and often...
• Aerosol1. A suspension of liquid or solid particles in air.
• Aerosol absorptionProcess in which radiation energy is retained by aerosols.
• Aerosol additiveChemical mixture in aerosol form generally used as a motor vehicle engine starting aid or carburetor cleaner...
• Aerosol adhesiveAdhesive that is dispensed from a pressurized container as a suspension of fine solid or liquid particles in...
• Aerosol can1. Any can into which a pressurized aerosol product is packaged.
• Aerosol coatingHand-held, pressurized, nonrefillable container that expels an adhesive or a coating in a finely divided...
• Aerosol coating importerAny person who brings an aerosol coating product that was manufactured, filled, or packaged at a location...
• Aerosol coating productPressurized coating product containing pigments or resins that is dispensed by means of a propellant and is...
• Aerosol coating products commercial applicationUse of aerosol coating products in the production of goods, or the providing of services for profit...
• Aerosol cooking sprayAny aerosol product designed either to reduce sticking on cooking and baking surfaces or to be directly...
• Aerosol effectAerosols can cause cooling by scattering incoming radiation or by affecting cloud cover. Aerosols can also...
• Aerosol extinctionThe removal of radiant energy from an incident beam by the process of aerosol absorption and/or scattering.
• Aerosol loadingAn increase in aerosol concentration.
• Aerosol mass spectrometryTechnique of using a mass spectrometer to determine aerosol properties.
• Aerosol processInteractions of radiant energy with atmospheric aerosols
• Aerosol product1. Product characterized by a pressurized spray system that dispenses product ingredients in aerosol form by...
• Aerosol scatteringThe scattering of radiative energy by processes at the aerosol and molecular level.
• Aerosols, see Aerosol
• Aerospace and air filtration productBonded wool fiberglass insulation manufactured for the thermal and acoustical insulation of aircraft and/or...
• Aerospace facilityAny facility that produces, reworks, or repairs in any amount any commercial, civil, or military aerospace...
• Aerospace vehicleAny fabricated part, processed part, assembly of parts, or completed unit, with the exception of electronic...
• Aerospace vehicle componentAny fabricated part, processed part, assembly of parts, or completed unit, with the exception of electronic...
• Aesthetic effectEffects that have undesirable tastes or odor
• Aesthetic zoningZoning which regulates property in the interest of protecting aesthetic values.
• AestheticsAesthetics associated with the aquatic ecosystem consist of the perception of beauty by one or a combination...
• Affected businessWith reference to an item of business information, a business which has asserted (and not waived or...
• Affected electric generating unitsteam generating unit that meets the relevant applicability conditions in section § 60.5845b.
• Affected emissions unitThe following emissions units, as applicable: (1) For a proposed new minor source, all the emissions units...
• Affected facilityWith reference to a stationary source, any apparatus to which a standard is applicable.
• Affected federal land managerFederal agency or the Federal official charged with direct responsibility for management of an area...
• Affected landfillUnder the Clean Air Act, landfills that meet criteria for capacity, age, and emissions rates set by the EPA...
• Affected parties1. "Affected parties" are stakeholders who are or may be impacted by EPA decisions.
• Affected public1. 1. The people who live and/or work near a hazardous waste site.
• Affected source1. Any stationary, area, or mobile source of a criteria pollutant(s) to which an EIP applies. This term...
• Affected unit1. Meaning given to it in the regulations promulgated under title IV of the Act.
• AffiliateMeaning set forth in section 2(a)(11) of the Public Utility Holding Company Act of 1935, 15 U.S.C...
• Affiliated entityA person who directly, or indirectly through one or more intermediaries, controls, is controlled by, or is...
• Affinity chromatographyA chromatographic separation technique based on the ability of proteins to bind specific ligands reversibly.
• Affinity electrophoresisType of electrophoresis in which changes in the electrophoresis pattern are brought about through the...
• Affirmative defense1. In the context of an enforcement proceeding, a response or defense put forward by a defendant, regarding...
• Affirmative procurement programRCRA section 6002 requires each procuring agency to establish an affirmative procurement program (APP) for...
• Afforestation1. Planting of new forests on lands that historically have not contained forests.
• Aflatoxicosis1. In well-developed countries, aflatoxin contamination rarely occurs in foods at levels that cause acute...
• Aflatoxin biosynthesisProduction of Furano-furano-benzopyrans by aspergillus from sterigmatocystin.. They are structurally related...
• AflatoxinsAflatoxins produce acute necrosis, cirrhosis, and carcinoma of the liver in a number of animal species; no...
• African AmericanA person having origins in any of the Black racial groups of Africa. It includes people who indicate their...
• African horse sicknessAn insect-borne reovirus infection of horses, mules and donkeys in Africa and the Middle East; characterized...
• After ripeningThe dormancy period following seed formation, necessary for embryo changes that insure germination.
• AfterbayThe tail race of a hydroelectric power plant at the outlet of the turbines. The term may be applied to a...
• Afterburner1. In incinerator technology, a burner located so that the combustion gases are made to pass through its...
• Aftermarket automotive brakes and liningsAutomotive friction brake articles sold in the secondary market as replacement parts ( e.g., brake pads...
• Aftermarket fuel additiveProduct which is added by the end-user directly to fuel in a motor vehicle or engine to modify the...
• Aftermarket partAny part offered for sale for installation in or on a motor vehicle after such vehicle has left the...
• Aftermarket service providerAny individual or business engaged in the diagnosis, service, and repair of a heavy-duty engine, who is not...
• After-only designsOne-shot studies; evaluation designs involving only measures taken after the program has been completed.
• AftershockAftershocks are earthquakes that follow the largest shock of an earthquake sequence. They are smaller than...
• Aftertreatment1. Passage of exhaust gases through a device or system such as a catalyst whose purpose is to chemically...
• Aftertreatment componentAny system or component or technology mounted downstream of the exhaust valve or exhaust port whose design...
• Aftertreatment systemAny system or component or technology mounted downstream of the exhaust valve or exhaust port whose design...
• Aftertreatment technologyAny system or component or technology mounted downstream of the exhaust valve or exhaust port whose design...
• AgaricalesAn extensive order of basidiomycetous fungi whose fruiting bodies are commonly called mushrooms.
• Age dependent adjustment factorIn cases where age-related differences in toxicity occur, differences in both toxicity and exposure need to...
• Age distributionThe frequency of different ages or age groups in a given population. The distribution may refer to either how...
• Age tankA tank used to store a chemical solution of known concentration for feed to a chemical feeder.
• Aged smokeWildfire or other smoke that is more than a few hours old, and has had time to travel from the source of the...
• Agency1. The United States Environmental Protection Agency.
• Agency admin1. A user granted administrative rights to view and modify all Agency manuscript submissions in NIHMS.
• Agency codeThis term is now obsolete; in the modernized STORET systems the unique identifier is referred to as an...
• Agency contactPerson(s) designated by the agency as the point of contact for a specific docket. Not all agencies designate...
• Agency decisionAny final determination made by the Agency under section 612 of the Act on the acceptability or...
• Agency desktop connectivity servicesProvide a wide range of services designed to ensure reliable, and efficient operation and maintenance of the...
• Agency for Toxic Substances and Disease Registry1. Agency for Toxic Substances and Disease Registry (ATSDR) is charged under the Superfund Act to assess the...
• Agency for Toxic Substances and Disease Registry minimal risk levelAn estimate of the daily human exposure to a hazardous substance that is likely to be without appreciable...
• Agency for Toxic Substances and Disease Registry's Hazardous Substance Release/Health Effects DatabaseSee http://www.atsdr.cdc.gov/hazdat.html. "HazDat", the Agency for Toxic Substances and Disease Registry's...
• Agency headHead of any Federal department or agency, for example, the Secretary of HHS, and any other officer or...
• Agency identifiersUnique identifiers assigned by S/L/Ts to facility sites, emissions units, release points, and emissions...
• Agency nameThis term is now obsolete; in the modernized STORET systems the name is referred to as an Organization Name.
• Agency recordsDocumentary materials of an executive agency that, based on Federal case law, are subject to the Freedom of...
• Agent1. Any physical, chemical, or biological entity that can induce an adverse response (synonymous with...
• Agent causation1. Agent causation is the concept that only "things" have the power to change the world (i.e., to be causes)...
• Agent for serviceEntity designated by a TPC or AB to receive legal documents on their behalf.
• Agent OrangeA toxic herbicide and defoliant used in the Vietnam conflict, containing 2,4,5-trichlorophen-oxyacetic acid...
• Agent-based risk assessmentA risk assessment that is specific to a particular chemical, agent, or stressor that are intended to provide...
• Agent-based risk assessments, see Agent-based risk assessment
• Age-related atrophyAtrophy of the nervous system tissues and/or muscle tissues that is related to aging.
• Age-related termWord or words which necessarily imply a particular age or range of ages (for example; ‘‘children,’’...
• Agglomerated nanoparticleA nanoparticle consisting of smaller particles joined in no definite pattern
• Aggradation1. The accumulation of sediment, usually implying an increase in deposit thickness.
• Aggregate1. A mass or cluster of soil particles, often having a characteristic shape.
• Aggregate batch vent stream1. Gaseous emission stream containing only the exhausts from two or more batch process vents that are ducted...
• Aggregate coral reefContinuous, high-relief coral formation that occurs in various shapes and lacks sand channels. This type...
• Aggregate costTotal cost of all research, surveys, studies, modeling, and other technical work completed by a Management...
• Aggregate exposure1. The sum total of all exposure to pesticides through inhalation, or dermal, oral, or optic contact.
• Aggregate exposure assessmentCombined exposures to a single stressor across multiple routes and multiple pathways.
• Aggregate facilityIndividual drain system together with ancillary downstream sewer lines and oil-water separators, down to and...
• Aggregate kilnRotary kiln that produces clinker by heating materials such as slate, shale and clay for subsequent...
• Aggregate limitsIndicates the amount of coverage that the insured has under the insurance policy for a specific period of...
• Aggregate risk1. The risk resulting from aggregate exposure to a single agent or stressor.
• Aggregate risk assessmentAggregate exposure and risk assessment involve the analysis of exposure to a single chemical by multiple...
• Aggregate stabilityThe ability of soil aggregates to resist degradation. An aggregate is many soil particles held together in a...
• Aggregate surveillanceThe surveillance of a disease or health event by collecting summary data on groups of cases, e.g., general...
• Aggregated Computational Toxicology ResourceWeb site developed by EPA's Office of Research and Development that utilizes a collection of databases...
• Aggregated import facilityAll import facilities within a PADD (Petroleum Administration for Defense District) owned or operated by an...
• Aggregation pointsCenters that accept used oil only from places owned by the same owner and operator as the aggregation point...
• Aggressive in-situ chemical flushing technologyIn situ chemical flushing involves flooding a zone of contamination with an appropriate solution to remove...
• Aging blemishesIn microform records, very small spots forming on silver gelatin film as a result of air pollution, improper...
• Aging infrastructureAge-related decay and other problems that appear in human-made structures, such as bridges, roads, pipelines...
• Agitator (Device)A device which mixes fluids often by stirring or shaking.
• Agonistic behavior1. Aggressive or defensive social behavior such as fighting, fleeing or submitting between individuals...
• Agreement collection certificationAs defined in § 3.3 of CROMERR, a signed statement by which a local registration authority certifies that a...
• Agreement state1. A state that has signed an agreement with the U.S. Nuclear Regulatory Commission (NRC) allowing the state...
• AgribusinessAn enterprise that derives a significant portion of its revenues from sales of agricultural products or sales...
• Agric horizonThe agric horizon is an illuvial horizon that has formed under cultivation and contains significant amounts...
• Agricultural activityUsual and customary activities of cultivating the soil, producing crops, and raising livestock for use and...
• Agricultural and animal wasteWaste generated by the production and harvest of crops or trees or the rearing of animals. Animal waste is a...
• Agricultural biomassCorn stover and other biomass crops used specifically for the production of cellulosic biofuels (e.g., energy...
• Agricultural burningBurning of vegetative debris from an agricultural activity that is necessary for disease or pest control, or...
• Agricultural by-productThose parts of arable crops that are not used for the primary purpose of producing food. Agricultural...
• Agricultural commodity1. Used by U.S. EPA to mean plant (or animal) parts consumed by humans as food. When such items are raw or...
• Agricultural commodity processing facilityFacility that processes any plant, or part thereof, or animal, or animal product, produced by a person...
• Agricultural conservation easementKeeps land in agriculture by paying farmers the difference between the farm value of their property and the...
• Agricultural conservation practiceMethods which reduce soil erosion and retain soil moisture. Major conservation practices include conservation...
• Agricultural Conservation ProgramThe ACP is no longer an active USDA program; it was replaced by EQIP.
• Agricultural digesterAnaerobic digester that processes only animal manure, crop residues, or separated yard waste with an adjusted...
• Agricultural drainage wellA Class V well that receives agricultural runoff. This well type includes improved sinkholes and abandoned...
• Agricultural drainage wells, see Agricultural drainage well
• Agricultural droughtAgricultural drought links various characteristics of meteorological (or hydrological) drought to...
• Agricultural employerAny person who hires or contracts for the services of workers, for any type of compensation, to perform...
• Agricultural engineeringDiscipline which includes the design of machinery, equipment and structures used for agricultural operations...
• Agricultural establishmentAny farm, forest, nursery, or greenhouse.
• Agricultural fiberFiber of an annual agricultural crop. Examples of agricultural fibers include, but are not limited to, wheat...
• Agricultural financeMoney required for agricultural activities
• Agricultural fireFire ignited to meet specific management objectives on agricultural lands.
• Agricultural hand laborAny agricultural activity performed by hand or with hand tools that causes a worker to have substantial...
• Agricultural Innovation & ServicesAgricultural Innovation and Sciences involves the creation and dissemination of better methods for farming...
• Agricultural inoculantBeneficial microorganisms (bacteria or fungi) encapsulated in carrier material and applied to the environment...
• Agricultural landLand on which a food crop, a feed crop, or a fiber crop is grown. This includes range land and land used as...
• Agricultural land habitatLand used for cultivating soil, producing crops, and raising livestock; farming.
• Agricultural land useUse of land for farming and food production.
• Agricultural landscapeAgricultural Land may be defined broadly as land used primarily for production of food and fiber. On...
• Agricultural pesticideAny pesticide product labeled for use in or on a farm, forest, nursery, or greenhouse.
• Agricultural plantAny plant grown or maintained for commercial or research purposes and includes, but is not limited to, food...
• Agricultural pollution1. The liquid and solid wastes from all types of farming, including runoff from pesticides, fertilizers and...
• Agricultural productAny commercially grown plant or plant product.
• Agricultural production1. The process of growing animal and vegetable products to make them available for human consumption and use.
• Agricultural production economicsEconomics of agricultural activities which change resources into commodities.
• Agricultural productivityThe efficiency with which inputs are transformed into outputs in the agricultural sector. Agricultural...
• Agricultural research agencyAny organization engaged in research pertaining to the agricultural use of pesticides, or any educational...
• Agricultural residueAgricultural crop residues are the plant parts, primarily stalks and leaves, not removed from the fields with...
• Agricultural runoff1. That part of the precipitation, snow melt, or irrigation water that appears in uncontrolled surface...
• Agricultural societyHuman society based on the farming of food crops, particularly grains, and raising animals.
• Agricultural solid wasteSolid waste that is generated by the rearing of animals, and the producing and harvesting of crops or trees.
• Agricultural Stabilization and Conservation ServiceASCS of USDA (now called Farm Service Agency).
• Agricultural structureHousing for agricultural activities and products, such as dairies, barns, and other housing for farm animals...
• Agricultural useUse of any pesticide or method or device for the control of pests in connection with the commercial...
• Agricultural user sectorPesticides applied by owner/operators and custom/commercial applicators to farms and facilities involved in...
• Agricultural waste1. Poultry and livestock manure, and residual materials in liquid or solid form generated from the production...
• Agricultural wastewater treatmentTechnology that treats agricultural pollutants that may degrade groundwater, surface water, air, and soil.
• Agricultural water resourceReserves of water for use in agriculture
• Agricultural water reuseUse of recycled water for production of both crops for human consumption and non-food crops of commercial...
• Agricultural workerWorking mostly on farms or ranches, but also in nurseries and slaughterhouses, these workers have numerous...
• AgricultureThe science or practice of farming, including growing crops and raising animals for the production of food...
• Agriculture disaster1. Natural disaster losses, resulting from drought, flood, fire, freeze, tornadoes, pest infestation, and...
• Agriculture industryThe Agriculture, Forestry, Fishing and Hunting sector comprises establishments primarily engaged in growing...
• Agriculture/ForestryHow community or regional agricultural and/or forestry industries will be impacted or proposed strategies or...
• Agriculture-related water reuseThe use of recycled water for production of both crops for human consumption and non-food crops of commercial...
• Agrobacterium radiobacter (strain K84)pesticide
• Agrochemical1. Synthetic chemicals (pesticide and fertilizers) used in agricultural production.
• Agroecosystem1. Land used for crops, pasture, and livestock; the adjacent uncultivated land that supports other vegetation...
• Agroecosystems, see Agroecosystem
• Agronomic sludge application rateWhole sludge application rate (dry weight basis) designed:(1) To provide the amount of nitrogen needed by the...
• AgronomyThe science of crop production and soil management.
• AgSTARA collaborative program sponsored by EPA and USDA that promotes the use of biogas recovery systems to reduce...
• AHERA designated personA person designated by a Local Education Agency to ensure that the AHERA requirements for asbestos management...
• Ailanthus altissimaTree-of-heaven, also known ailanthus, Chinese sumac, and stinking shumac, is a deciduous tree in the mostly...
• Air1. The mixture of gases that surrounds the earth and forms its atmosphere, composed of, by volume, 21 percent...
• Air binding1. A situation where air enters the filter media. Air is harmful to both the filtration and backwash...
• Air bladder1. Air sac located in the coelomic cavity of many fishes. In some fishes it may retain a tubular connection...
• Air blanketLayer of air inside the solvent cleaning machine freeboard located above the solvent/air interface. The...
• Air carrierAn operator (e.g., airline) in the commercial system of air transportation consisting of aircraft that hold...
• Air changes per hour1. The movement of a volume of air in a given period of time; if a house has one air change per hour, it...
• Air cleanerA device using filters or electrostatic precipitators to remove indoor-air pollutants such as tobacco smoke...
• Air cleaning1. Indoor-air quality-control strategy to remove various airborne particulates and/or gases from the air...
• Air cleaning systemA device or combination of devices applied to reduce the concentration of airborne contaminants, such as...
• Air climate energyIntegrated relationships between these earth and human systems.
• Air compressor systemAir compressors, piping, receiver tanks, volume tanks and bottles, dryers, airlines, and related...
• Air conditioner1. (Appliance for) cooling and dehumidifying the air in an enclosed space by use of a refrigeration unit...
• Air conditioning idle testTest procedure specified in §86.165-12.
• Air contaminantAny particulate matter, gas, or combination thereof, other than water vapor.
• Air curtainA method of containing oil spills. Air bubbling through a perforated pipe causes an upward water flow that...
• Air curtain incinerator1. Incinerator that operates by forcefully projecting a curtain of air across an open chamber or pit in which...
• Air depositionAn airborne pollutant (often nitrogen) that falls onto the land and runs off into the water, or falls onto...
• Air emission testing bodyCompany or other entity that provides to the owner or operator the certification required by section 6.1.2(b)...
• Air emissions1. The release or discharge of a pollutant into the air.
• Air erosion1. The passage of air over friable ACBM which may result in the release of asbestos fibers.
• Air exchange rate1. The rate at which outside air replaces indoor air in a given space.
• Air facility systemAn EPA data system that contains compliance and permit data for stationary air pollution sources regulated by...
• Air filtrationProcess of separating dispersed particles of pollutants and microrganisms from air.
• Air flask specialty coatingAny special composition coating applied to interior surfaces of high pressure breathing air flasks to provide...
• Air flotation unitEquipment used to remove suspended materials from wastewater, by bubbling compressed air through the...
• Air freshenerAny consumer product including, but not limited to, sprays, wicks, powders, and crystals designed for the...
• Air gap1. An open vertical drop, or vertical empty space, that separates a drinking (potable) water supply to be...
• Air handling unit1. A type of heating and/or cooling distribution that channels warm or cool air to different parts of a...
• Air heaterDevice that recovers heat from the flue gas for use in pre-heating the incoming combustion air and...
• Air infiltrationEntry of outdoor air through small openings, joints, cracks and around closed windows and doors.
• Air injected flareFlare in which air is blown into the base of a flare stack to induce complete combustion of gas.
• Air majorA major source has actual or potential emissions at or above the major source threshold for any “air...
• Air Mass1. A large volume of air with certain meteorological or polluted characteristics--e.g., a heat inversion or...
• Air minorAir pollution source which is not a major source.
• Air modelModels simulating the movement of substances in the atmosphere or ambient air
• Air monitoring & forecastingThe monitoring of ambient air to assess current air quality conditions and forecast future air quality...
• Air monitoring systemSystems designed to monitor the emission of pollutants generally from point sources
• Air oxidation reactorAny device or process vessel in which one or more organic reactants are combined with air, or a combination...
• Air oxidation reactor recovery trainIndividual recovery system receiving the vent stream from at least one air oxidation reactor, along with all...
• Air oxidation unit processUnit process, including ammoxidation and oxychlorination unit process, that uses air, or a combination of air...
• Air padding1. Pumping dry air into a container to assist with the withdrawal of a liquid or to force a liquefied gas...
• Air parcel1. An imaginary body of air.
• Air passageOpenings through or within walls, through floors and ceilings, and around chimney flues and plumbing chases...
• Air passages, see Air passage
• Air permeabilityPermeability of soil with respect to air. Important to the design of soil-gas surveys. Measured in darcys or...
• Air permittingTerms associated with EPA regulation of atmospheric pollutants.
• Air plenumAny space used to convey air in a building, furnace, or structure. The space above a suspended ceiling is...
• Air PM 2.5 levelParticulate matter (PM2.5) levels in air, micrograms per cubic meter (µg/m3) annual average.
• Air pollutant1. Any substance in air that could, in high enough concentration, harm man, other animals, vegetation, or...
• Air pollutant monitorInstrument, sampler, analyzer, or other device that measures or assists in the measurement of atmospheric air...
• Air pollutants, see Air pollutant
• Air pollution1. The presence of contaminants or pollutant substances in the air that interfere with human health or...
• Air pollution control device1. Mechanism or equipment that cleans emissions generated by a source (e.g. an incinerator, industrial...
• Air pollution control device modification1. For the purposes of § 63.862(a)(1)(ii)(E)(1), any physical change (excluding any routine part replacement...
• Air pollution control equipmentIncludes baghouses, particulate or gaseous scrubbers, and any other apparatus utilized to control emissions...
• Air pollution control techniqueAny method, such as an add-on air pollution control device or a chemical fume suppressant, that is used to...
• Air pollution control wastewaterBlow-down water and sludges from air pollution control;incineration air pollution control wastewaters
• Air pollution episodeA period of abnormally high concentration of air pollutants, often due to low winds and temperature...
• Air pollution (ICIS-AIR), see Air pollution
• Air pollution potentialProducts may contain volatile organic compounds (VOC). When these products are used, the VOCs may escape to...
• Air pollution scoreThe Air Pollution Score is based on the government emission standards for which the vehicle was certified to...
• Air pollution source1. Any source of air pollution subject to applicable legal requirements as defined in paragraph (c).
• Air preheatDevice used to heat the air supplied to a process heater generally by use of a heat exchanger to recover the...
• Air programs facility operator1. Any person who operates or supervises a facility or supplier.
• Air QualityA measure of the degree to which air is free from harmful pollution.
• Air quality advisoriesThese advisories are usually called when the Air Quality Index (or AQI) gets into the unhealthy ranges...
• Air quality analysis groupAir Quality Analysis Group (of EPA's Office of Air, OAQPS, located in RTP, NC). Tracks and analyzes air...
• Air quality assessment divisionAir Quality Assessment Division (of EPA's Office of Air, OAQPS, located in RTP, NC). Develops and makes...
• Air quality control region1. Area designated as an air quality control region (AQCR) under section 107(c) of the Act.
• Air quality criteriaThe levels of pollution and lengths of exposure above which adverse health and welfare effects may occur.
• Air quality degradationThe air gains more harmful pollution.
• Air quality improvementImprovement in the degree to which air is free from harmful pollution.
• Air Quality Index1. An index for reporting daily air quality that characterizes air pollution levels and associated health...
• Air quality modelA model that simulates concentrations in air have one of three general designs: plume models, grid models...
• Air quality modeling groupAir Quality Modeling Group (of EPA's Office of Air, OAQPS, located in RTP, NC). Directs pollution modeling...
• Air quality policy divisionAir Quality Policy Division (of EPA's Office of Air, OAQPS, located in RTP, NC). Manages policies and...
• Air quality standardThe level of pollutants prescribed by regulations that are not (to) be exceeded during a given time in a...
• Air quality standards, see Air quality standard
• Air quality system1. EPA's repository of ambient air quality data, AQS stores data from over 10,000 monitors, 5000 of which are...
• Air regulatory localityGeographic areas and localities in the United States which are defined by federal regulations or legislation...
• Air retarderA material or structural element that inhibits air flow into and out of a building's envelope or shell. This...
• Air rightsThe rights to the airspace above a surface property. Sometimes sold for further development
• Air scavenging systemAir collection and control system that collects and removes vapors from a thermal treatment process vessel...
• Air side economizerAn air economizer cycle reduces the load on the chilled water system by increasing the flow of outside air...
• Air source heat pumpAn air-source heat pump is the most common type of heat pump. The heat pump absorbs heat from the outside air...
• Air spaceThe area between the layers of glazing (panes) of a window.
• Air sparging1. Injecting air or oxygen into groundwater to strip or flush volatile contaminants up through the...
• Air stripping1. A treatment system that removes volatile organic compounds (VOCs) from contaminated ground water or...
• Air temperature1. Air temperature in RAINE refers to changes over time not extreme temperature events.
• Air toxicAny air pollutant that causes or may cause cancer, respiratory, cardiovascular, or developmental effects...
• Air toxics1. Any air pollutant for which a national ambient air quality standard (NAAQS) does not exist (i.e. excluding...
• Air toxics cancer risk1. Estimated lifetime inhalation cancer risk from the analyzed carcinogens in ambient outdoor air, as...
• Air toxics data updateEPA's regular update of air toxics information, including the National Emissions Inventory and AirToxScreen.
• Air toxics respiratory hazard indexAir toxics respiratory hazard index (the sum of hazard indices for those air toxics with reference...
• Air toxics screening assessmentEPA's ongoing thorough review of air toxics in the United States. AirToxScreen results help scientists focus...
• Air toxics trace emissionEmission of small amounts of air pollutants that cause or may cause cancer or other serious health effects...
• Air transportationIndustries in the Air Transportation subsector provide air transportation of passengers and/or cargo using...
• Air-assisted airless sprayAir-assisted airless spray uses compressed air to shape and distribute the fan of atomized paint, but still...
• Airbag wasteHazardous waste airbag modules or hazardous waste airbag inflators.
• Airbag waste collection facilityFacility that receives airbag waste from airbag handlers subject to regulation under §261.4(j) of this...
• Airbag waste handlerPerson, by site, who generates airbag waste that is subject to regulation under this chapter.
• Airborne bacteriaBacteria that travels by air, often spreading disease upon inhalation by humans or animals.
• Airborne dustType of particulate matter pollution, which includes airborne sand, dirt, carbon, etc. that can carry...
• Airborne emissions1. Releases of gases to the atmosphere (e.g., the release of carbon dioxide during fuel combustion)...
• Airborne fumeAn airborne dispersion consisting of small solid particles created by condensation from a gaseous state, in...
• Airborne fungusA fungus that is disseminated through the air by spores. Molds, smuts, and rusts are commonly air and wind...
• Airborne microorganismBacteria, yeasts, fungi, and their spores that travel by air, often spreading disease upon inhalation by...
• Airborne moldMold spores naturally occuring in outdoor air, most found as microrganisms on the surface of leaves. Examples...
• Airborne particlesSolid or liquid particulate matter small enough to be suspended in the atmosphere; such as soot, ash, dust...
• Airborne particulatesTotal suspended particulate matter found in the atmosphere as solid particles or liquid droplets. Chemical...
• Airborne releaseRelease of any pollutant into the air.
• Airborne sporeSpores are microscopic. They vary in shape and range from 2 to 100 microns in size. Spores travel in several...
• Airborne transmission1. Situations where droplet nuclei (residue from evaporated droplets) or dust particles containing...
• Airborne Visible and Infrared Imaging SpectrometerSpectrometer sensitive to visible and infrared radiation that is capable of being carried and operated on an...
• Air-ConditioningThe process of treating air to meet the requirements of a conditioned space by controlling its temperature...
• Aircraft1. A machine used for flying. Airplanes, helicopters, blimps and jets are all aircraft.
• Aircraft deicing fluidADF less any water added by the manufacturer or customer before ADF application.
• Aircraft engine1. The engine of a machine used for flying. Airplanes, helicopters, blimps and jets are all aircraft.
• Aircraft engine emissionsEmission from the engine of a machine used for flying
• Aircraft fluid systemSystems that handle hydraulic fluids, fuel, cooling fluids, or oils.
• Aircraft gas turbine engineTurboprop, turbofan, or turbojet aircraft engine.
• Aircraft halon bottle1. Vessel used as a component of an aircraft fire suppression system containing halon-1301 approved under FAA...
• Aircraft operatorAny person or company that owns or operates an aircraft.
• Aircraft transparencyAircraft windshield, canopy, passenger windows, lenses, and other components which are constructed of...
• Aircraft water systemAircraft that qualifies as a public water system under the Safe Drinking Water Act and the national primary...
• Aircraft water system operations and maintenance planSchedules and procedures for operating, monitoring, and maintaining an aircraft water system that is included...
• Airfield pavementAll paved surfaces on the airside of an airport.
• AirfoilShape of the blade cross-section, which for most modern horizontal-axis wind turbines is designed to enhance...
• Airless and air-assisted airless sprayAny coating spray application technology that relies solely on the fluid pressure of the coating to create an...
• Airless sprayAny paint spray technology that relies solely on the fluid pressure of the paint to create an atomized paint...
• Air/oil table1. The surface between the vadose zone and the oil; pressure of oil in the porous medium is equal to...
• AirplanePower-driven fixed wing aircraft, heavier than air, which are supported by the dynamic reaction of the air...
• Airplane exemptionTo allow, through a formal case-by-case process, an airplane to be certificated and operated that does not...
• Airport1. A landing area regularly used by aircraft for receiving or discharging passengers or cargo.
• Air-purifying respiratorA respirator with an air-purifying filter, cartridge, or canister that removes specific air contaminants by...
• Air-sea gas exchangeAir-sea gas exchange is a physio-chemical process, primarily controlled by the air-sea difference in gas...
• Airshed1. The area of land over which airborne pollutants can travel to reach a particular river, lake, bay or other...
• AirsidePart of an airport directly involved in the arrival and departure of aircraft, including runways, taxiways...
• Air-surface exchangeMovement of substances between the atmosphere and the surface of the Earth.
• Air-to-water heat pumpA type of heat pump that transfers heat in outdoor air to water for space or water heating.
• Airway hyperresponsivenessMeasurement of a form of hypersensitivity affecting the respiratory tract. It includes asthma and rhinitis...
• Airway resistancePhysiologically, the opposition to flow of air caused by the forces of friction. As a part of pulmonary...
• Akaike Information CriteriaA statistical procedure that provides a measure of the goodness-of-fit of a dose-response model to a set of...
• Akaikes information criterion1. These are criteria that are used in model selection to select the best model from a set of plausible...
• Akebia quinataFiveleaf akebia, also known as chocolate vine, is a woody perennial plant that grows either as a twining vine...
• AkineteA thick-walled resting cell produced from a vegetative cell
• AlabamaThe Alabama River Basin. Alabama, Georgia, Tennessee. Area = 22700 sq.mi.
• AlachlorA herbicide, marketed under the trade name Lasso, used mainly to control weeds in corn and soybean fields.
• AlanineA small non-essential amino acid in humans, Alanine is one of the most widely used for protein construction...
• AlarTrade name for daminozide, a pesticide that makes apples redder, firmer, and less likely to drop off trees...
• Alarm contactA switch that operates when some pre-set low, high or abnormal condition exists.
• Alaska NativeSelf-identification among people of Alaska Native descent. These are the six Alaska Native race and ethnic...
• Alaska Native allotmentBureau of Land Management-defined locations based on land survey records associated with the Public Land...
• Alaska Native allotments, see Alaska Native allotment
• Alaska Native Regional CorporationCensus Bureau-defined, corporate entities organized to conduct both for-profit and non-profit affairs of...
• Alaska Native Regional Corporations, see Alaska Native Regional Corporation
• Alaska Native villageBoundary-centroid locations based on records provided by the Bureau of Land Management and administered under...
• Alaska Native villages, see Alaska Native village
• Alaska Railbelt GridService areas of the six regulated public utilities that extend from Fairbanks to Anchorage and the Kenai...
• Alaska remote area1. Areas of Alaska that meet either paragraph (1) or (2) of this definition.(1) Areas of Alaska that are not...
• Alaska Standard TimeNine hours behind Coordinated Universal Time
• Alaskan North SlopeApproximately 69,000 square mile area extending from the Brooks Range to the Arctic Ocean.
• Albedo1. Albedo, or solar reflectance, is a measure of a material's ability to reflect sunlight (including the...
• Alber's map projectionA standard map projection for representing the conterminous 48 United States. This is a conic equal area...
• Albic horizonThe albic horizon is an eluvial horizon, 1.0 cm or more thick, that has 85 percent or more (by volume) albic...
• Albizia julibrissinSilk tree, also known as mimosa, or silky acacia, is a small to medium-sized tree that can grow up to 20-40...
• AlbuminuriaPresence of serum albumin in the urine
• AlcoholMixture containing 85 percent or more by volume methanol, ethanol, or other alcohols, in any combination.
• Alcohol abuseMisuse of alcohol which demonstrably interferes with a person’s health, interpersonal relations or working...
• Alcohol cleaningRemoving dirt and residue material from a part using alcohol.
• Alcohol dual fuel automobileAutomobile which is designed to operate on alcohol and on gasoline or diesel fuel; and which provides equal...
• Alcohol fuelFuel consisting primarily (more than 50 percent by weight) of one or more alcohols: e.g., methyl alcohol...
• Alcohol-fueled automobileAutomobile designed to operate exclusively on alcohol.
• Alcohol-fueled engineEngine that is designed to run using an alcohol fuel. For purposes of this definition, alcohol fuels do not...
• Alcohol-fueled locomotiveLocomotive with an engine that is designed to run using an alcohol fuel. For purposes of this definition...
• Alcohol-fueled vehicle1. Vehicle that is designed to run using an alcohol fuel. For purposes of this definition, alcohol fuels do...
• Alcoholic brain atrophyAtrophy of the cerebral cortex and/or cerebellum due to chronic ethanol consumption.
• Alcohols, see Alcohol
• Aldehydes1. Organic compounds containing a carbonyl group in the form -CHO.
• AldicarbAn insecticide sold under the trade name Temik. It is made from ethyl isocyanate.
• AldosteroneHormone secreted by the adrenal cortex that regulates electrolyte and water balance by increasing the renal...
• AldrinCompound aldrin as identified by the chemical name, 1,2,3,4,10,10-hexachloro-1,4,4a,5,8,8a-hexahydro-1,4...
• Aleatory uncertaintyAleatory is of or pertaining to natural or accidental causes and cannot be explained with mechanistic theory...
• AlendronateA nonhormonal medication for the treatment of postmenopausal osteoporosis in women. This drug builds healthy...
• Aleutian LowA semi-permanent, subpolar area of low pressure located in the Gulf of Alaska near the Aleutian Islands. It...
• Aleutian mink diseaseA slow progressive disease of mink caused by the Aleutian mink disease virus. It is characterized by poor...
• Aleutian Mink Disease VirusA species of parvovirus that causes a disease in mink, mainly those homozygous for the recessive Aleutian...
• AlewifeA small silver-colored fish that is not native to Lake Erie.
• Alfisols1. The central concept of Alfisols is that of soils that have an ochric epipedon, an argillic horizon, and...
• Algae1. Simple rootless plants that grow in sunlit waters in proportion to the amount of available nutrients. They...
• Algae and plant nutrients-NitrogenNutrients are any substance, like nitrogen and phosphorus, assimilated by living things that promote growth...
• Algae bloomA dense population of algae whose growth is fueled by excess nutrients. Algae blooms can block sunlight from...
• Algae blooms, see Algae bloom
• Algae grown photosyntheticallyAlgae that are grown such that their energy and carbon are predominantly derived from photosynthesis.
• Algal bloom1. An episode of excessive nutrient content in a river, stream or lake, which causes a proliferation of...
• Algal blooms, see Algal bloom
• Algal population growthRelative measure of the viability of an algal population based on the number and/or weight of algal cells per...
• Algal turfDensely packed algae, usually filamentous, which rise less than one centimeter above the substratum upon...
• Algicide1. A pesticide that controls algae in swimming pools and water tanks.
• Algistatic substanceHaving the property of inhibiting algal growth.
• Algorithm1. A precise rule (or set of rules) for solving some problem.
• Algorithm developmentDevelopment of a precise rule (or set of rules) for solving some problem.
• Aliases1. An alias is a symbolic link which points to a specified directory. NCC recommends that aliases be created...
• Alien invasiveInvasive species of plants not native to a region which, when introduced either accidentally or...
• ALIENATIONUnlawfully transferring records or losing custody of them to an unauthorized organization or person.
• AlignmentThe horizontal route or direction of an access road.
• Alimentary canalThe canal, including the stomach and intestines, leading from the mouth to the anus.
• AliphaticOf or pertaining to a broad category of carbon compounds distinguished by a straight, or branched, open chain...
• Aliphatic amino acidsThe aliphatic R group of these acids consists only of straight or branched carbon chains with attached...
• Aliphatic hydroxy acids(Al-uh-FAT-ick) Organic acids with carbon atoms arranged in branched or unbranched open chains rather than in...
• Aliquot1. (AL-li-kwot) Portion of a sample.
• Alkali(AL-ka-lie) Various soluble salts, principally of sodium, potassium, magnesium, and calcium, that have the...
• Alkali bypassDuct between the feed end of the kiln and the preheater tower through which a portion of the kiln exit gas...
• Alkali metalsGroup IA elements of the periodic table. Includes sodium and potassium among others. Generally reactive...
• Alkalies and chlorine manufacturingThis U.S. industry comprises establishments primarily engaged in manufacturing chlorine, sodium hydroxide...
• Alkaline1. The condition of water or soil that contains a sufficient amount of alkali substance to raise the pH above...
• Alkaline chemicalsSubstances that cause an object to become less acidic when they come into contact with each other.
• Alkaline chlorinationUsed to destroy cyanides. Most often the process is operated in two stages, with separate tanks for each...
• Alkaline cleaningSolution (bath), usually detergent, to remove lard, oil, and other such compounds from a metal surface...
• Alkaline cleaning bathBath consisting of an alkaline cleaning solution through which a workpiece is processed.
• Alkaline cleaning for oil removalApplication of an alkaline cleaning agent to a metal part to remove oil and grease during the manufacture...
• Alkaline cleaning neutralizationUsing a dilute acid solution to lower the pH of alkaline cleaning rinse water that remains on the part after...
• Alkaline cleaning rinseRinse following an alkaline cleaning bath through which a workpiece is processed. A rinse consisting of a...
• Alkaline hydrolysisThe use of solutions of sodium hydroxide (or other alkali) in the treatment of cellulosic material (wood) to...
• Alkaline mine drainageMine drainage which, before any treatment, has a pH equal to or greater than 6.0 and total iron concentration...
• Alkaline storage tankStorage vessel containing alkaline material in a liquid or solid form often used to supply an air pollution...
• Alkaline treatment with cyanideCleaning of a metal surface with an alkaline solution containing cyanide. Wastewater generated during...
• Alkaline Treatment without CyanideDescribes the application of an alkaline solution not containing cyanide to a metal surface to clean the...
• Alkalinity1. Having the properties of a base with a pH of more than 7. A common alkaline is baking soda.
• Alkalinity producing systemA type of passive treatment system designed to produce neutral effluent with excess alkalinity. Typically...
• AlkalinizationA process in which the hydrogen ion concentration of a solution is decreased, resulting in an increase in...
• AlkaloidsOrganic nitrogenous bases. Many alkaloids of medical importance occur in the animal and vegetable kingdoms...
• Alkanes1. Aliphatic hydrocarbons having the general formula Cn H2n+2. Alkanes can be straight chains, branched...
• Alkenes1. The group of unsaturated hydrocarbons having the general formula Cn H2n and characterized by being highly...
• AlkydsAlkyds are thermosetting unsaturated polyester resins produced by reacting an organic alcohol with an organic...
• Alkylated aromaticsThe class of ringed aromatic compounds containing one or more aliphatic side chains.
• Alkylating activityAlkylating Activity in biological systems is typically a process of covalent bonding in which a chemical...
• Alkylating agentHighly reactive chemicals that introduce alkyl radicals into biologically active molecules and thereby...
• Alkylation1. A refining process for chemically combining isobutane with olefin hydrocarbons (e.g., propylene, butylene)...
• Alkynes1. The group of unsaturated hydrocarbons with a triple carbon-carbon bond having the general formula Cn H2n-2.
• All Appropriate Inquiries RuleThe process of evaluating a property's environmental conditions and assessing potential liability for any...
• All electric auxiliary batteryIn an electric drive vehicle, the auxiliary battery provides electricity to power vehicle accessories.
• All in, All out productionA production system whereby animals are moved into and out of facilities in distinct groups. By preventing...
• All insect life stagesEggs, larvae, juveniles, and adults.
• All Mapped Water (NHD)All waters identified by the U.S. Geological Survey (USGS) for the National Hydrography Dataset (NHD). Mapped...
• All mapped watersAll waters identified by the U.S. Geological Survey (USGS) for the National Hydrography Dataset. Mapped...
• All other consumer product formsAll consumer product forms for which no form-specific VOC standard is specified. Unless specified otherwise...
• All water sourcesIncludes water from all supply sources such as community water supply (i.e., tap water), bottled water, etc.
• Allantoic fluidThe white of an egg
• AllantoisA vascularized extra-embryonic membrane of amniote embryos that forms as a narrow outgrowth of the hind...
• Allegation1. An accusation of a suspected loss of scientific integrity or violation of the EPA's Scientific Integrity...
• AlleghenyThe Allegheny River Basin. Pennsylvania, New York. Area = 11600 sq.mi.
• Allele1. One of several alternative forms of a gene that differs from other forms by a mutation in the DNA sequence.
• All-electric melterGlass melting furnace in which all the heat required for melting is provided by electric current from...
• All-electric vehicleAlso called battery electric vehicles, have a battery that is charged by plugging the vehicle in to charging...
• AllelochemicalA chemical substance produced by one organism that is toxic or inhibitory to the growth or well being of...
• Allelopathy1. A particular form of amensalism found in plants. In this interaction, one species produces and releases...
• Allergen1. A substance, such as mold, that can cause an allergic reaction.
• Allergenic potentialAbility to produce immediate hypersensitivity
• Allergens, see Allergen
• Allergic reactionCan include rash, itching, swelling, sneezing, runny nose, or trouble breathing due to contact with things a...
• Allergic response measurement(Measurement of) an exaggerated response by the immune system to a drug or other substance.
• Allergic rhinitisInflammation of the mucous membranes in the nose that is caused by an allergic reaction.
• AllergyAltered reactivity to an antigen, which can result in pathologic reactions upon subsequent exposure to that...
• AlleyA walking area for cattle within a barn such as a loafing alley, feeding alley or cross alley (walkway) from...
• Alley collectionCollection of solid waste from containers placed adjacent to or in an alley.
• Alley scraperA V shaped mechanical blade that is dragged over an alley by chain or cable to pull manure to collection...
• Alliaria petiolataGarlic mustard is a cool season biennial herb with stalked, triangular to heart-shaped, coarsely toothed...
• AlloantigenAn antigen that occurs in some but not other members of the same species.
• Allocable costCost which is attributable to a particular cost objective, such as a grant, project, service, or other...

2,431 of 29,894 terms in Environment terminology (MLC-0121). Request the full dataset.