Environment terminology · MLC-0121
Environment terms: A (2,484)
- Animal Nervous System1. Specialized components of vertebrates,and, to a lesser extent invertebrates, that control body actions and...
- Animal Neural PathwayNeural tracts connecting one part of the nervous system with another.
- Animal NeurogliaThe non-neuronal cells of the nervous system.
- Animal Neuron1. The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their...
- Animal Neurosecretory SystemA system of neurons that has the specialized function to produce and secrete hormones, and that constitutes...
- Animal NoseA part of the upper respiratory tract. It contains the organ of smell. The term includes the external nose...
- Animal Olfactory BulbPart of the brain where the olfactory nerves terminate
- Animal Olfactory OrganPart of the body that enables smell detection
- Animal Optic LobeIn invertebrate zoology, a lateral lobe of the forebrain in certain arthropods.. In vertebrate zoology...
- Animal OviductDucts that serve exclusively for the passage of eggs from the ovaries to the exterior of the body. In...
- Animal PancreasA nodular organ in the abdomen that contains a mixture of endocrine glands and exocrine glands. The small...
- Animal Pancreatic JuiceFluids made by an animal's pancreas which contains digestive enzymes.
- Animal Parasitic DiseasesAnimal diseases caused by PARASITES.
- Animal Parasitic NematodeRound worms that complete part of their life cycle in animals.
- Animal Pathogenic BacteriaOrganisms such as viruses, bacteria, and parasites, that are capable of invading and infecting animal hosts...
- Animal Pathogenic FungusFungus that causes disease in wildlife, domesticated animals and fish
- Animal Pathogenic MicroorganismOrganisms such as viruses, bacteria, and parasites, that are capable of invading and infecting animal hosts...
- Animal PenisThe external reproductive organ of males.
- Animal PericardiumThe fibrous sac surrounding the heart.
- Animal Peripheral Nervous SystemThe nervous system outside of the brain and spinal cord. The peripheral nervous system has autonomic and...
- Animal PharynxThe throat of an animal
- Animal Phenotype1. The observable structural and functional characteristics of an animal that result from the interaction of...
- Animal Pheromone GlandGland producting a chemical substance that is released by one organism to influence the biology or behaviour...
- Animal PhysiologyThe functions of an animal
- Animal Pineal GlandA light-sensitive neuroendocrine organ
- Animal Pituitary GlandA small, unpaired gland situated in the sella turcica tissue. It is connected to the hypothalamus by a short...
- Animal PlagueAn acute infectious disease caused by Yersinia pestis that affects humans, wild rodents, and their...
- Animal Prion DiseasesA group of genetic, infectious, or sporadic degenerative human and animal nervous system disorders associated...
- Animal ProductionIndustries in the Animal Production subsector raise or fatten animals for the sale of animals or animal...
- Animal Production AreaThat part of an AFO that includes the animal confinement area, the manure storage area, the raw materials...
- Animal ProteomeAll of the proteins produced by a given species just as the genome is the totality of the genetic information...
- Animal Pulmonary AlveolusTiny air sacs at the end of the bronchioles in the lungs.
- Animal PylorusThe region of the stomach at the junction with the duodenum. It is marked by the thickening of circular...
- Animal Q-FeverAn acute infectious disease caused by Coxiella burnetti. It is characterized by a sudden onset of fever...
- Animal RabiesAcute viral CNS infection affecting mammals, including humans. It is caused by rabies virus and usually...
- Animal Reproduction1. The total process by which organisms produce offspring. (Stedman, 25th ed)
- Animal Reproductive BehaviorBehavior or activities related to the increase of a species.
- Animal Reproductive DisordersIssues that prevent successful live births of animals, such as infertility and spontaneous abortion
- Animal Reproductive SystemOrgans and substances in an animal necessary for sexual reproduction.
- Animal Respiratory SystemThe tubular and cavernous organs and structures, by means of which pulmonary ventilation and gas exchange...
- Animal Reticuloendothelial SystemMononuclear cells with pronounced phagocytic ability that are distributed extensively in lymphoid and other...
- Animal RightsThe view that (non-human) animals have moral or legal rights. Proponents of animal rights tend to regard...
- Animal RingwormFungal infection of keratinized tissues such as hair, skin and nails.
- Animal RoleA characteristic which exists only when the animal is interacting with another animal, a human, a chemical...
- Animal Salivary GlandGlands that secrete saliva in the mouth to aid the breakdown of consumed foods.
- Animal SalmonellosisInfections with bacteria of the genus Salmonella.
- Animal Scientific NameUnits used in the science of biological classification, or taxonomy.
- Animal ScrotumThe external pouch that in most mammals contains the testes.
- Animal SemenSecretion of the male reproductive organs. It is composed of spermatozoa in their nutrient plasma and various...
- Animal Sense OrganOrgans of sight, hearing, taste and smell.
- Animal Sensory SystemSystem of organisms in animals that provide the senses of sight, hearing, taste and smell
- Animal SerosaA thin lining of closed cavities of the body, consisting of a single layer of squamous epithelial cells (...
- Animal SkeletonA supportive or protective structure or framework of an animal, a plant, or part of an animal or plant. In...
- Animal SkinOuter covering of the body that serves to protect the body and its organs
- Animal Slaughtering and ProcessingThis industry comprises establishments primarily engaged in one or more of the following: (1) slaughtering...
- Animal Smooth MuscleTissue specialized for contraction with spindle shaped non striated fibres [Anatomy and Physiology of Animals...
- Animal Social BehaviorAny kind of interaction between two or more animals, usually between animals of the same species.
- Animal Somatic Cell1. Any body cell other than gametes (egg or sperm); sometimes referred to as "adult" cells.
- Animal Spermatic CordThe structure in the male reproductive system attached to the testis that carries the vas deferens, arteries...
- Animal SpermatophoreCapsule containing sperm to be directly or indirectly transferred to from males to females.
- Animal Splanchnic Nerve TissueThe major nerves supplying sympathetic innervation to the abdomen. The greater, lesser, and lowest (or...
- Animal StressPhysical reaction to danger, threat of harm, or lack of nutrition or hydration
- Animal Studies1. Investigations using animals as surrogates for humans, on the expectation that results in animals are...
- Animal SweatThe fluid excreted by the sweat glands. It consists of water containing sodium chloride, phosphate, urea...
- Animal Sweat GlandSweat-producing structures that are embedded in the dermis. Each gland consists of a single tube, a coiled...
- Animal Synapse1. Specialized junctions at which a neuron communicates with a target cell. At classical synapses, a neuron's...
- Animal Synovial FluidThe clear, viscous fluid secreted by the synovial membrane. It contains mucin, albumin, fat, and mineral...
- Animal TearsThe fluid secreted by the lacrimal glands. This fluid moistens the conjunctiva and cornea.
- Animal Temporal Activity TypeAnimals classified by the time of day they are active
- Animal TendonFibrous bands or cords of connective tissue at the ends of muscle fibers that serve to attach the muscles to...
- Animal TestingUse of animal subjects to determine the efficacy, side effects, etc., of medicines or other products or...
- Animal ThalamusPaired bodies containing mostly gray substance and forming part of the lateral wall of the third ventricle of...
- Animal Thoracic DuctThe largest lymphatic vessel that passes through the chest and drains into the subclavian vein.
- Animal Thymus GlandAn organ that is part of the lymphatic system, in which T lymphocytes grow and multiply.
- Animal Tick-Borne DiseasesBacterial, viral, or parasitic diseases transmitted to humans and animals by the bite of infected ticks. The...
- Animal TissueAn aggregate of cells with similar or identical specialized characteristics, contributing to the performance...
- Animal TonsilA round-to-oval mass of lymphoid tissue embedded in the lateral wall of the pharynx. [NLM Medical Subject...
- Animal TorsoThe central part of the body to which the neck and limbs are attached. [NLM Medical Subject Headings (MeSH)].
- Animal ToxicantA toxic agent which is harmful to animals, particularly domesticated animals.
- Animal ToxoplasmosisToxoplasmosis is an infection due to the parasite Toxoplasma gondii. Toxoplasmosis is found in humans...
- Animal Trait1. Any aspect of the appearance, behavior, development, biochemistry, or other feature of an animal.
- Animal TuberculosisAny of the infectious diseases of man and other animals caused by species of Mycobacterium.
- Animal unitA unit of measurement for any animal feeding operation calculated by adding the following numbers: the number...
- Animal Unit MonthA measure of average monthly stocking rate that is the tenure of one animal unit for a period of 1 month...
- Animal Urinary BladderA musculomembranous sac along the urinary tract. Urine flows from the kidneys into the bladder via the...
- Animal Urinary TractPathways through the body for expelling liquid wastes
- Animal Uterine TissueTissue of the female organ where the fetus develops
- Animal VectorAnimate intermediary in the indirect transmission of an agent that carries the agent from a reservoir to a...
- Animal VentThe posterior opening of the intestine, gonads, and kidney ducts. The vent is located just anterior to the...
- Animal Vertebrate TracheaThe windpipe of a vertebrate.
- Animal Viral DiseasesA general term for diseases produced by viruses.
- Animal VocalizationSounds used in animal communication.
- Animal VulvaThe external genitalia of the female.
- Animal Waste1. Waste generated by the production and harvest of crops or trees or the rearing of animals. Animal waste is...
- Animal Waste • Electronic Waste + Hazardous Waste1. By-products of society that can pose a substantial or potential hazard to human health or the environment...
- Animal Waste DischargeDrainage of animal waste including feedlot and paddock runoff from livestock, dairy, and other animal-related...
- Animal Waste ManagementProcess of controlling animal-produced waste in a way that does not harm or pollute the environment.
- Animal WelfareThe sum or integration of an animal's past and present states of well-being as it attempts to cope with its...
- Animal Welfare EthicsThe ethical obligation to protect and promote animal welfare in research. Factors affecting animal welfare...
- Animal YersiniosisYersiniosis is an infectious disease caused by a bacterium of the genus Yersinia. In the United States, most...
- Animal-Based FoodFood originating from animal sources.
- Anion1. (AN-EYE-en) A negatively charged ion in an electrolyte solution, attracted to the anode under the...
- Anion Transporter BindingAnion Transporter Binding involves temporary non-covalent interaction of a molecule through intermolecular...
- Anionic Polymer(AN-eye-ON-ick) A polymer having negatively charged groups of ions; often used as a filter aid and for...
- anionsNegatively charged molecule such as sulfate (SO4(2-)) and nitrate (NO3-). In combination with hydrogen (H+)...
- Anisotropic1. Having a physical property, which varies with direction.
- anisotropy1. The conditions under which one or more of the hydraulic properties of an aquifer vary with direction.
- Annealing with OilUse of oil to quench a workpiece as it passes from an annealing furnace.
- Annealing with WaterUse of a water spray or bath, of which water is the major constituent, to quench a workpiece as it passes...
- Annex I Countries/PartiesGroup of countries included in Annex I (as amended in 1998) to the United Nations Framework Convention on...
- Annotate InventoryAn algorithm to develop a control strategy that assigns control measures to an emissions inventory based on...
- AnnotationAdding pertinent information such as gene coded for, amino acid sequence, or other commentary to the database...
- Announcements & SchedulesNews, calendars, comment schedules, meeting agendas, requests for proposals, timelines, records schedules...
- AnnoyanceA general feeling of displeasure or adverse psychological reaction toward a source. Associated with...
- AnnualA plant that lives for one year or one growing season.
- Annual averageThe highest allowable concentration, mass loading, or production-normalized mass loading of a pollutant over...
- Annual Average Batch Vent Concentration1. Determined using Equation 1, as described in § 63.1323(h)(2) for halogenated compounds.
- Annual Average Batch Vent Flow Rate1. Determined by the procedures in § 63.1323(e)(3).
- Annual Average Concentration1. As used in the wastewater provisions, means the flow-weighted annual average concentration, as determined...
- Annual Average Discharge LimitationMaximum allowable discharge of BOD5 or TSS as calculated by multiplying the total mass (kkg or 1000 lb) of...
- Annual Average Flow Rate1. As used in the wastewater provisions, means the annual average flow rate, as determined according to the...
- Annual Capacity Factor1. Ratio between the actual heat input to a steam generating unit from the fuels listed in § 60.42b(a), §...
- Annual Consumption1. Annual consumption refers to the amount of electricity used by a consumer in one year and is typically...
- Annual Copper and Other Nonferrous Foundry Metal Melt CapacityFor new affected sources, the lower of the copper and other nonferrous metal melting operation capacity...
- Annual Copper and Other Nonferrous Foundry Metal Melt ProductionFor existing affected sources, the quantity of copper and other nonferrous metal melted in melting operations...
- Annual CostThe total annual cost (including both capital and operating and maintenance) required to keep a control...
- Annual Cover CropAnnual crop planted as a rotation between primary planted crops or between trees and vines in orchards and...
- Annual Debt PaymentThe dollar amount that must be paid each year towards retiring existing debt.
- Annual Document LogDetailed information maintained at the facility on the PCB waste handling at the facility.
- Annual Electricity ConsumptionRefers to the amount of electricity used in one year and is typically measured in kilowatt-hours (kWh).
- Annual fuel utilization efficiencyThe measure of seasonal or annual efficiency of a residential heating furnace or boiler. Specifically, it is...
- Annual Heat InputHeat input for the 12 months preceding the compliance demonstration.
- Annual Mean Flow1. Average of daily flows over a calendar year. Historical data (up to 10 years) must be used where available.
- Annual Metal Melt Capacity1. Lower of the total metal melting furnace equipment melt rate capacity assuming 8,760 operating hours per...
- Annual Metal Melt Production1. Quantity of metal melted in a metal melting furnace or group of all metal melting furnaces at the iron and...
- Annual Non-Propeller Aircraft DepartureAverage number of commercial turbine-engine aircraft that are propelled by jet, i.e., turbojet or turbofan...
- Annual Operating and Maintenance (O&M) CostThe annual cost to operate and maintain the measure once it has been installed on the source. This is a...
- Annual Operating ExpensesTotal annual cost of operating and maintaining the water or wastewater utility service. This does not include...
- Annual Plant(Plant which) completes life cycle (seed germinations, flowering, and death) in one year or growing season.
- Annual Pollutant Loading RateMaximum amount of a pollutant that can be applied to a unit area of land during a 365 day period.
- Annual Report1. Written document submitted each year by each disposer and commercial storer of PCB waste to the...
- Annual Reportable Amount1. The ARA is equal to the combined total quantities released at the facility (including disposed of within...
- Annual statistical summaryA document that presents a brief and comprehensive report of EMAP data collected on a single EMAP resource...
- Annual UseCriterion for determining whether a standby intake may be used to evaluate the nearest intake factor. To meet...
- Annual Whole Sludge Application RateMaximum amount of sewage sludge (dry weight basis) that can be applied to a unit area of land during a 365...
- Annual Work PlanPlan, developed by the Management Conference each year, which documents projects to be undertaken during the...
- Annualized Capital Cost1. The annualized cost of installing a control measure on a source, assuming a particular discount rate and...
- Annualized Cost per TonThe annual cost divided by the emission reduction achieved by a control measure. This is a column found in...
- Annualized valueA constant stream of benefits or costs. The annualized cost is the constant amount that a party would have to...
- Annular Space1. (AN-you-ler) A ring-shaped space located between two circular objects, such as two pipes.
- Annulus1. Either the space between the casing of a well and the well bore or the space between the tubing and casing...
- Anode1. (an-0-d) The positive pole or electrode of an electrolytic system, such as a battery.
- Anode Bake FurnaceOven in which the formed green anodes are baked for use in a prebake process. This definition includes...
- Anode Bake Furnace StartupProcess of initiating heating to the anode bake furnace. The startup or re-start of the furnace begins when...
- Anode Bake PlantFacility which produces carbon anodes for use in a primary aluminum reduction plant.
- Anode Casting FurnaceAny furnace that melts materials to produce the anodes used in the electrolytic process for the production of...
- Anode CopperCopper that is cast into anodes and refined in an electrolytic process to produce high purity copper.
- Anode EffectProcess upset condition of an aluminum electrolysis cell caused by too little alumina dissolved in the...
- Anode Effect Minutes per Cell DayTotal minutes during which an electrolysis cell voltage is above the threshold voltage, typically 8 volts.
- Anode Refining Department1. Area at a primary copper smelter in which anode copper refining operations are performed. Emissions...
- Anodizing BathElectrolytic solution used as the conducting medium in which the flow of current is accompanied by movement...
- Anodizing OperationAny step in the anodizing process in which a metal is cleaned, anodized, or colored when each such step is...
- Anodizing with Chromium1. Producing a protective oxide film on aluminum, magnesium, or other light metal, usually by passing an...
- Anodizing without ChromiumApplying a protective oxide film to aluminum, magnesium, or other light metal, usually by passing an electric...
- AnoikisAny apoptotic process triggered by inadequate or inappropriate adherence to substrate, such as may occur...
- AnomalyRefers to deviation from uniformity in a physical property.
- Anonymity (provision for)Evaluator action to ensure that the identity of subjects cannot be ascertained during the course of a study...
- AnorexiaLack or loss of appetite for food
- Anoxia1. A condition in which little or no oxygen is present in a body of water. Also called a "dead zone."
- Anoxic1. The total deprivation of oxygen.
- Anoxic Limestone DrainA type of passive treatment system consisting of a trench of buried limestone into which acid water is...
- Anoxic/Anaerobic Fixed Film Biological TreatmentBiological treatment in which microorganisms attach to inert media and break down organic materials in the...
- Anoxygenic PhotosynthesisPhotosynthesis which captures energy from the sun and converts it to ATP, but which does not produce oxygen...
- Anoxygenic PhototrophOrganisms which trap light energy and convert it to ATP without forming oxygen
- ANSI AccreditationThe approval by the ANSI Executive Standards Council of the written procedures submitted by a standards...
- Antagonism1. Interference or inhibition of the effect of one chemical by the action of another chemical.
- AntagonisticExposure to multiple stressors that leads to a decreased response that is less than what would be estimated...
- antagonistic effect1. A biologic response to exposure to multiple substances that is less than would be expected if the known...
- Antarctic EnvironmentNatural and physical environment of Antarctica and its dependent and associated ecosystems, but excludes...
- Antarctic Environmental ImpactImpact on the Antarctic environment and dependent and associated ecosystems.
- Antarctic "Ozone Hole"1. Refers to the seasonal depletion of ozone in the upper atmosphere above a large area of Antarctica.
- Antarctic Treaty AreaArea south of 60 degrees south latitude.
- AntarcticaAntarctic Treaty area; i.e., the area south of 60 degrees south latitude.
- AntennaAny structure or device used to collect or radiate electromagnetic waves.
- Antenna CoatingCoating formulated and recommended for application to equipment and associated structural appurtenances that...
- Antenna PigmentMolecules that absorb light to begin the process of photosynthesis in plants.
- Antenna Specialty CoatingAny coating applied to equipment through which electromagnetic signals must pass for reception or...
- Antennal GlandThe main organ in crustaceans used for excretion and osmoregulation; the green gland.
- AntennatingInsects communicate by signaling with their antenna
- AnthelminticAn agent that is destructive to worms especially of the intestine
- AntherThe pollen bearing portion of a stamen. (FDA)
- Anthophyllite1. Type of asbestos in the amphibole group; it is also known as azbolen asbestos.
- Anthracite1. A hard, black, lustrous coal containing a high percentage of fixed carbon and a low percentage of volatile...
- Anthracite CoalSolid fossil fuel classified as anthracite coal by American Society of Testing and Materials (ASTM) Method...
- Anthropogenic1. Pertains to the [environmental] influence of human activities.
- Anthropogenic AerosolAerosol which is a result of human activities
- Anthropogenic Effect1. Made by people or resulting from human activities. Usually used in the context of emissions that are...
- Anthropogenic HeatAnthropogenic heat is heat generated by buildings, people, or machinery. Estimates of anthropogenic heat...
- Anthropogenic NanoparticleNanoparticles produced by human activities.
- Anthropogenic ParticleParticle which is a result of human activities
- Anthropogenic Spills & Incidents ResponseActivities to respond on an emergency basis to oil spills, hazardous waste spills, industrial accidents and...
- Anthropogenic Visibility ImpairmentAny humanly perceptible difference due to air pollution from anthropogenic sources between actual visibility...
- Anthropogenic WaveBoat wake or other wave caused by energy resulting from human activity.
- AnthropometricThe study of human body measurements for use in anthropological classification and comparison.
- Anti-Acne AgentGenerally a dermatological drug applied topically to treat acne. Acne causes whiteheads, blackheads and...
- Anti-Anxiety AgentAgents that alleviate anxiety, tension, and anxiety disorders, promote sedation, and have a calming effect...
- Anti-Backsliding1. A provision in the Federal Regulations [CWA 303(d)(4); CWA 402(c); CFR 122.44(l)] that requires a reissued...
- Anti-Bacterial AgentSubstances that reduce the growth or reproduction of bacteria.
- Antibiotic1. A metabolic product of one microorganism or a chemical that in low concentrations is detrimental to...
- Antibiotic ResiduesThe presence of traces of antibiotics or their derivatives in milk or meat.
- Antibiotic ResistanceThe mechanisms, functions, activities, or processes exhibited by microorganisms, especially bacteria, to...
- Antibiotic Resistance DevelopmentAntibiotic resistance (develops) when bacteria change in some way that reduces or eliminates the...
- Antibiotic Test KitTest kit for use on the farm to detect residues of antibiotics in milk before the milk is picked up for...
- antibody1. A type of protein made by certain white blood cells in response to a foreign substance (antigen). Each...
- Antibody Degradation ProcessAntibody Degradation consists of conjugation, transport, oxidation, and/or proteolysis of members of a class...
- Antibody FormationThe production of antibodies by proliferating and differentiated B-lymphocytes under stimulation by antigens.
- Antibody Titer RegulationAny physiologic response that results in an increased number of active antibodies circulating in the plasma...
- Antibody-Producing CellCells of the lymphoid series that can react with antigen to produce specific cell products called antibodies.
- Antichafe CoatingCoating applied to areas of moving aerospace components that may rub during normal operations or installation.
- Anti-Chip CoatingSpecialty type of coating designed to reduce stone chipping damage. Anti-chip coating may be applied to broad...
- Anticipated Process and EventThose natural processes and events that are reasonably likely to occur during the period the intended...
- Anticipatory ResearchOver-the-horizon research program seeks to anticipate and address future scientific needs in support of...
- Anticline1. A fold that is convex upward or had such an attitude at some stage of development. In simple anticlines...
- Anticoagulant1. An agent that prevents blood clotting
- AnticonvulsantDrugs used to prevent seizures or reduce their severity.
- AnticycloneA large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the...
- Anti-DegradationPolicies that are part of each state's water quality standards. These policies are designed to protect water...
- Antidegradation1. A policy to ensure the protection of water quality for a particular water body where the water quality...
- Anti-Degradation ClausePart of federal air quality and water quality requirements prohibiting deterioration where pollution levels...
- Anti-Degradation PoliciesPolicies that are part of each state's water quality standards. These policies are designed to protect water...
- Antidegradation policyA required process for protecting all existing uses, keeping healthy waters healthy and giving strict...
- Antidepressant AgentMood-stimulating drugs used primarily in the treatment of affective disorders and related conditions. Several...
- Antifoaming AgentAgents used to prevent the formation of foam or to treat flatulence or bloat.
- AntifoulantCoating that resists the growth of organisms such as barnacles and algae on submerged surfaces.
- Antifoulant Specialty CoatingAny coating that is applied to the underwater portion of a vessel to prevent or reduce the attachment of...
- Anti-Fouling CoatingCoating formulated and recommended for application to submerged stationary structures and their appurtenances...
- Anti-FungalSubstances that destroy fungi by suppressing their ability to grow or reproduce. They differ from fungicides...
- Antifungal AgentSubstances that destroy fungi by suppressing their ability to grow or reproduce. They differ from industrial...
- antigen1. Any foreign substance (generally proteins) to which the body reacts by producing antibodies. Antigens may...
- Antigen BindingAntigen Binding Interaction involves specific and high affinity non-covalent interaction (binding) of an...
- Antigen Presentation InteractionAntigen Presentation Interaction involves specific non-covalent interaction (binding) through intermolecular...
- Antigen ReceptorMolecules on the surface of B- and T-lymphocytes that recognize and combine with specific antigens.
- Antigen-Antibody ReactionThe processes triggered by interactions of antibodies with their antigens.
- Antigen-Presenting Cell1. A cell that enables a T-lymphocyte to recognize an antigen by engulfing the antigen, breaking down the...
- Anti-Graffiti CoatingClear or opaque high performance coating formulated and recommended for application to interior and exterior...
- AntihistamineDrugs that bind to but do not activate histamine receptors, thereby blocking the actions of histamine or...
- Antihypertensive AgentDrugs used in the treatment of acute or chronic vascular hypertension regardless of pharmacological...
- Anti-Infective AgentSubstances that prevent infectious agents or organisms from spreading or kill infectious agents in order to...
- AntilewisiteDimercaprol; also called British anti-lewisite, or BAL
- Antimetabolite1. A substance that interferes with utilization of an essential metabolite
- Anti-MicrobialAn agent that kills microbes.
- Antimicrobial1. Agent that kills microbial growth (i.e., chemical or substance that kills mold or other organisms). See...
- Anti-Microbial PesticideAny chemical substance which can be used to kill microorganisms.
- Antimicrobial Pesticide1. Substance or mixture of substances used to kill or suppress the growth of harmful microorganisms such as...
- Antimony and Antimony CompoundsIncludes any unique chemical substance that contains antimony as part of that chemical's infrastructure.
- Antimony Compounds (1.0)Includes any unique chemical substance that contains antimony as part of that chemical's infrastructure.
- Antineoplastic AgentSubstance that inhibits or prevents the proliferation of neoplasms.
- AntinutrientCompound that inhibits the normal uptake of nutrients.
- Antioxidant1. Naturally occurring or synthetic substances that inhibit or retard the oxidation of a substance to which...
- AntiperspirantAgents that are put on the skin to reduce sweating or prevent excess sweating
- Antipsychotic AgentAgents that control agitated psychotic behavior, alleviate acute psychotic states, reduce psychotic symptoms...
- Antipyretic1. An agent that relieves or reduces fever
- Antique Aerospace VehicleAircraft or component thereof that was built at least 30 years ago. An antique aerospace vehicle would not...
- Antique Aerospace Vehicle ComponentAircraft or component thereof that was built at least 30 years ago. An antique aerospace vehicle would not...
- Antireflection CoatingA thin coating of a material applied to a photovoltaic cell surface that reduces the light reflection and...
- AntiscalantSubstances added to certain water systems to prevent crystallized mineral salts (scale) from forming in the...
- AntisepticLocal anti-infective agents used on humans and other animals. (Adapted from Hawley's Condensed Chemical...
- Antispermatogenic AgentAgents, either mechanical or chemical, which destroy spermatozoa in the male genitalia and block...
- Antistatic AgentChemical compounds applied to materials to reduce their retention of an electrostatic charge.
- Anti-StatsAn additive that reduces static electricity
- AntitoxinAntibodies capable of destroying toxins generated by microorganisms including viruses and bacteria.
- Antiviral Agent1. Agents used in the prophylaxis or therapy of virus diseases. Some of the ways they may act include...
- ApalachicolaThe coastal drainage and associated waters from the Ochlockonee River Basin boundary to and including the...
- APERTURE CARDAn 80-column tabulating sized card with a hole, or aperture, containing usually one frame of 35-mm microfilm...
- AphasiaDefect or loss of power of expression by or comprehension of speech, writing, or signs
- AphididaeA family (Aphididae) of small insects, in the suborder Sternorrhyncha, that suck the juices of plants...
- Aphotic ZoneThat portion of the ocean where light is insufficient for plants to carry on photosynthesis.
- API numberA unique identifying number for all oil and gas wells drilled in the United States. The system was developed...
- API unitThe American Petroleum Institute (API) has established test pits for calibrating neutron and gamma logs. The...
- ApialesA group of flowering plants where the flowers usually grow in umbrels.
- ApidaeInsect members of the superfamily Apoidea, found almost everywhere, particularly on flowers. About 3500...
- ApocritaNarrow-waisted hymenopterans, ants, bees, true wasps.
- Apomixis1. Biological reproduction without fertilization, meiosis, or production of gametes, resulting in seeds that...
- Apoptosis1. A form of programmed cell death that begins when a cell receives internal or external signals, then...
- A-posteriori Detection1. A binary detection decision based upon the observed (net) signal and a definite criterion of detection. It...
- Apparent resistivity/conductivityThe resistivity of a homogeneous isotropic ground that would give the same voltage/current or...
- Appearance of Loss of ImpartialityIn carrying out their official duties, employees must first consider whether there are any factors that would...
- AppendageA natural prolongation or projection from a part of an organism either animal or plant; a part that is joined...
- Apple RotFungal disease of apples most common in warm and humid growing environments.
- Apple ScabDisease of apples caused by the fungus Venturia inacqualis.
- AppletA small application program. On the Web, using Java, the object-oriented programming language, an applet is a...
- Appliance1. Any device which contains and uses a Class I (chlorofluorocarbon; CFC) or Class II...
- Appliance by Power TypeA piece of equipment, commonly powered by electricity, used to perform a particular energy-driven function...
- Appliance DisposalProcess leading to and including: (1) The discharge, deposit, dumping or placing of any discarded appliance...
- Appliance Efficiency IndexA relative comparison of trends in new-model efficiencies for major appliances and energy-using equipment...
- Appliance Normal Operating CharacteristicAppliance operating temperatures, pressures, fluid flows, speeds, and other characteristics, including full...
- Appliance Normal Operating ConditionAppliance operating temperatures, pressures, fluid flows, speeds, and other characteristics, including full...
- AppliancesAny device which contains and uses a Class I (chlorofluorocarbon; CFC) or Class II (hydrochlorofluorocarbons...
- Applicability AnalysisProcess of determining if your Federal action must be supported by a conformity determination.
- Applicability and Utility1. One of EPA's five Assessment Factors (see definition) that describes the extent to which the information...
- APPLICABLE CREDITS1. Those receipts or reduction of expenditure type transactions that offset or reduce expense items allocable...
- Applicable Effluent Standard and LimitationAll State, interstate, and federal standards and limitations to which a “discharge,” a “sewage sludge use or...
- Applicable Emission Standard1. Emission standard to which a fuel-system component is subject. Additionally, if a fuel-system component...
- Applicable Implementation Period EndDecember 31 of the year in which the next periodic comprehensive implementation plan revision is due under §...
- Applicable Implementation Plan1. Defined in section 302(q) of the CAA and means the portion (or portions) of the implementation plan, or...
- Applicable Legal RequirementAny of the following:(1) In the case of any major source, any emission limitation, emission standard, or...
- Applicable Marine Water Quality CriteriaCriteria given for marine waters in the EPA publication “Quality Criteria for Water” as published in 1976 and...
- Applicable or Relevant and Appropriate RequirementFederal or state environmental standards; the NCP states that ARARs should be considered in determining...
- Applicable or Relevant and Appropriate Requirements1. Applicable requirements are those clean-up standards of control, and other substantive environmental...
- Applicable Plan1. Plan, or most recent revision thereof, which has been approved under § 60.27(b) or promulgated under §...
- Applicable Requirement1. Those cleanup standards, standards of control, and other substantive requirements, criteria, or...
- Applicable RequirementsTitle V permits must assure compliance with all of the requirements that apply to a source.Common sources of...
- Applicable Standard1. Emission standard to which an engine is subject; or a family emission limit to which an engine is...
- Applicable State Implementation PlanPortion (or portions) of the SIP or most recent revision thereof, which has been approved under section...
- Applicable Water Quality StandardState water quality standards adopted by the State pursuant to section 303 of the Act or promulgated by EPA...
- Applicant1. Any entity that files an application or unsolicited proposal for EPA Financial assistance under 40 Chapter...
- Applicant TypeThe type Indicates whether the applicant is a federal, state, tribal, private, or other public entity. This...
- Application1. The most specific category of equipment. This description is generally used in sectors where the end-uses...
- Application Directed ResearchResearch directed to the solution of defined problems.
- Application Exclusion ZoneArea surrounding the point(s) of pesticide discharge from the application equipment that must generally be...
- Application for Research or Marketing PermitAny of the following:(1) An application for registration, amended registration, or reregistration of a...
- Application Niche1. The set of conditions under which the use of a model is scientifically defensible. The identification of...
- Application Niche IdentificationThe set of conditions under which the use of a model is scientifically defensible. The identification of...
- Application Niche Uncertainty1. Uncertainty as to the appropriateness of a model for use under a specific set of conditions (see...
- Application Programming Interface1. Routine or other software device provided by a software vendor or developer to access specific...
- Application QuestionnaireEPA's “Applicant Questionnaire for Modification of Secondary Treatment Requirements,” published as an...
- Application-Specific AllowanceLimited authorization granted in accordance with subsection (e)(4)(B)(iv) of the AIM Act for the production...
- Applied Coating Solid1. Volume of dried or cured coating solids which is deposited and remains on the surface of the automobile or...
- Applied Coating Volatile Organic CompoundProduct of Method 24 VOC analyses or formulation data (if those data are demonstrated to be equivalent to...
- Applied Dose1. In exposure assessment, the amount of a substance in contact with the primary absorption boundaries of an...
- applied epidemiology1. The application or practice of epidemiology to address public health issues.
- Applied Organic LoadThe quantity of organic material (e.g., manure) applied to lands or introduced to a receiving waterbody or...
- Applied Research1. Research designed for the purpose of producing results that may be applied to real world situations.
- Applied Research & Science SupportApplied Research and Science Support includes all activities to provide new research and original technical...
- Applied ScienceApplied Science involves all activities that produce original scientific knowledge and technologies to...
- Applied Substance AmountAmount of organic HAP, coating material, or coating solids (as appropriate for the emission standards in §...
- Apply Measures In SeriesAn algorithm to develop a control strategy that assigns all control measures that can be used for a source to...
- APPRAISALThe process of determining the value and thus the final disposition of records, making them either temporary...
- Apprehension of Criminal Violators of Federal Environmental LawsActivities associated with the tracking, arrest, detention, and transportation of groups or individuals...
- Apprentice1. Any person who is currently registered as an apprentice in service, maintenance, repair, or disposal of...
- Approach AngleSmallest angle in a plan side view of an automobile, formed by the level surface on which the automobile is...
- Appropriate PackagingWhen used with respect to child-resistant packaging, means that the packaging is chemically compatible with...
- Appropriate Pollution Control TechnologyWastewater treatment technology listed in Table 10 to this part 455 for a particular PAI(s) including an...
- Appropriate Sensitive Benthic Marine OrganismTwo or more species that together represent filter-feeding, deposit-feeding, and burrowing characteristics...
- Appropriate Sensitive Marine OrganismAt least one species each representative of phytoplankton or zooplankton, crustacean or mollusk, and fish...
- Appropriately Sensitive AnimalAppropriately sensitive animals which carry out respiration by means of a lung structure permitting gaseous...
- AppropriationThe right to withdraw water from its source.
- Appropriation Doctrine1. The system for allocating water to private individuals used in most Western states. The doctrine of Prior...
- AppropriativeWater rights to or ownership of a water supply which is acquired for the beneficial use of water by following...
- Approval Authority1. The director in an NPDES Authorized State with an approved state pretreatment program, or the appropriate...
- Approval Memo1. A memo originated by the Project Officer and concurred in by the immediate supervisor which denotes work...
- APPROVAL OFFICIALAn EPA official delegated the authority to approve or reject applications for assistance and the...
- Approved Equipment Testing OrganizationAny organization which has applied for and received approval from the Administrator pursuant to § 82.160.
- Approved Independent Standards Testing OrganizationAny organization which has applied for and received approval from the Administrator pursuant to § 82.38.
- Approved MeasureRefers to one contained in an NSO which is in effect.
- Approved Methyl Bromide Critical UseThose uses of methyl bromide listed in Column A of appendix L to this subpart as further clarified in Columns...
- Approved Methyl Bromide Critical UserPerson who: (1) For the applicable control period, applied to EPA for a critical use exemption or is a member...
- Approved Permit Program1. State permit program approved by the Administrator as meeting the requirements of part 70 of this chapter...
- Approved POTW pretreatment program1. A program administered by a POTW that meets the criteria established in 40 CFR Part 403 and that has been...
- Approved Program1. A state Subtitle D permit program or other system of prior approval and conditions required under section...
- Approved Refrigerant Recycling EquipmentEquipment certified by the Administrator or an organization approved under § 82.38 as meeting either one of...
- Approved Regional MethodContinuous PM 2.5 method that has been approved specifically within a State or local air monitoring network...
- Approved Renewable Fuel Pathwaypathway listed in table 1 to § 80.1426 or in a petition approved under § 80.1416 that is eligible to generate...
- Approved Replicable Methodology1. Part 70 permit terms that:(1) Specify a protocol which is consistent with and implements an applicable...
- Approved Section 120 ProgramA State program to assess and collect Section 120 penalties that has been approved by the Administrator.
- Approved State1. State or interstate program which has been approved or authorized by EPA under part 123.
- Approved State DirectorChief administrative officer of a state agency responsible for implementing the state permit program that is...
- Approved state pretreatment program1. A program administered by a state that meets the criteria established in 40 CFR 403.10 and that has been...
- Approved State primacy program1. Those program elements listed in subsection 142.11(a) that were submitted with the initial State...
- Approved State Program1. State program which has received EPA approval under this part.
- Approved/Authorized stateA state with an NPDES permit program approved pursuant to CWA section 402(b) and an approved state...
- Approximate Original ContourThe surface configuration achieved by backfilling and grading of the mined area so that the reclaimed area...
- Appurtenance1. (uh-PURR-ten-nans) Machinery, appliances, structures and other parts of the main structure necessary to...
- AppurtenantA traditional property law term used to describe an easement that is created to benefit an adjacent parcel of...
- Apricot ProcessingProcessing of apricots into the following product styles: Canned and frozen, pitted and unpitted, peeled and...
- A-priori Detection1. An estimate, based on a knowledge of the probability distribution of a net signal, of the detection...
- Apron1. An extensive, subaqueous, blanket-like deposit of alluvial, unconsolidated material that is derived from...
- Aquaculture1. This industry comprises establishments primarily engaged in the farm raising and production of aquatic...
- Aquaculture Facility DischargeDischarge from a facility for the farming of plants and animals that live in water, such as fish or shellfish.
- Aquaculture Production1. Farming of plants and animals that live in water, such as fish, shellfish, and algae.
- Aquaculture ProjectDefined at § 122.25.
- Aquaculture WellsClass V wells that dispose of water used for the cultivation of marine and freshwater animals and plants.
- Aquatic1. Pertaining to water.
- Aquatic AnimalAppropriately sensitive wholly aquatic animals which carry out respiration by means of a gill structure...
- Aquatic Animal Containment SystemCulture or rearing unit such as a raceway, pond, tank, net or other structure used to contain, hold or...
- Aquatic Assemblage1. An organism group of interacting populations in a given waterbody, for example, fish assemblage or a...
- Aquatic BiotaCollective term describing the organisms living in or depending on the aquatic environment.
- Aquatic Classification SystemAssigns a classification to a waterbody reflecting the water quality and the biological health (integrity)...
- Aquatic CommunityAssociation of interacting assemblages in a given waterbody, the biotic component of an ecosystem.
- Aquatic Ecosystem1. Complex of biotic and abiotic components of natural waters. The aquatic ecosystem is an ecological unit...
- Aquatic EnvironmentWaters of the United States, including wetlands, that serve as habitat for interrelated and interacting...
- Aquatic feature1. Describing different formations of water bodies [Original source...
- Aquatic FloraPlant life associated with the aquatic eco-system including, but not limited to, algae and higher plants.
- Aquatic Human Food Chain OrganismAquatic species directly consumed by humans, including certain finfish, shellfish, crustaceans, amphibians...
- Aquatic InvertebrateAnimals without backbones that live in the water. Often used to determine water quality. Examples include...
- Aquatic Life1. Aquatic life describes the status of fish, macroinvertebrates, plants, and animals that live in the water.
- Aquatic Life Entrainment1. Incorporation of all life stages of fish and shellfish with intake water flow entering and passing through...
- Aquatic Life ProtectionProtection of the organisms that live in water.
- Aquatic Life UseA beneficial use designation in which the waterbody provides suitable habitat for survival and reproduction...
- Aquatic PlantA plant that grows in water either floating on the surface, growing up from the bottom of the body of water...
- Aquatic Plant and Animal ProtectionMinimization of adverse effects on populations of plants and animals can be achieved by:(a) Avoiding changes...
- Aquatic PlantsPlants that grow in water either floating on the surface, growing up from the bottom of the body of water or...
- Aquatic reef1. A solid, three-dimensional ecological community made up of densely packed oysters or other natural...
- Aquatic Resource ConditionRelative ability of an aquatic resource to support and maintain a community of organisms having a species...
- Aquatic Resource EnhancementManipulation of the physical, chemical, or biological characteristics of an aquatic resource to heighten...
- Aquatic Resource EstablishmentManipulation of the physical, chemical, or biological characteristics present to develop an aquatic resource...
- Aquatic Resource Functional CapacityDegree to which an area of aquatic resource performs a specific function.
- Aquatic Resource PreservationRemoval of a threat to, or preventing the decline of, aquatic resources by an action in or near those aquatic...
- Aquatic resourcesInclude wetlands, streams, lakes, rivers, springs, seeps, ponds, and groundwater.
- Aquatic System Management GoalNarrative statement that expresses the desired condition of an aquatic system.
- Aquatic Vertebrate SpeciesVertebrate species that lay eggs or bear young in water. Included are all fishes, nearly all amphibians, and...
- Aquatic WeedsAquatic Weeds (noxious aquatic plants) choke waterways, degrade healthy aquatic habitats, and interfere with...
- AqueductA pipe, conduit, or channel designed to transport water from a remote source, usually by gravity.
- Aqueous1. Something made up of water.
- Aqueous CondensationPrecipitation of water-containing constituents from a gas phase to a liquid phase. Aqueous condensation is a...
- Aqueous DegreasingCleaning metal parts using aqueous-based cleaning chemicals primarily to remove residual oils and greases...
- Aqueous Film-Forming FoamThe firefighting foam and seawater mixture discharged during training, testing, or maintenance operations.
- Aqueous Solubility1. The maximum concentration of a chemical that will dissolve in pure water at a reference temperature.
- AquicludeAn impermeable body of rock that may absorb water slowly, but does not transmit it.
- Aquifer1. A water-bearing layer of rock (including gravel and sand) that will yield water in usable quantity to a...
- Aquifer BoundaryA physical barrier to ground water flow identified as the contact between geologic materials defined as an...
- Aquifer ContaminationTo introduce a substance that causes the maximum contaminant level for nitrate in 40 CFR 141.62(b) to be...
- Aquifer DiscontinuitiesGeologic and hydrologic features or structures that entirely transect an aquifer (or multiple aquifers, if...
- Aquifer Exemption1. An aquifer is an underground body of rock that contains or can transmit groundwater. Underground Injection...
- Aquifer InterconnectionsSubsurface conditions that allow two or more aquifers separated by aquifer boundaries to be combined into a...
- Aquifer Recharge WellsClass V wells that are used to inject fluids to recharge an aquifer. These wells may have secondary purposes...
- Aquifer Recovery WellsClass V wells that are used to inject fluids to recharge an aquifer. These wells may have secondary purposes...
- Aquifer Remediation WellClass V wells that are used to clean up, treat, or prevent contamination of underground sources of drinking...
- Aquifer Remediation WellsClass V wells that are used to clean up, treat, or prevent contamination of underground sources of drinking...
- Aquifer RestorationProcess of restoring the quality of water to a contaminated aquifer.
- aquifer test1. A test to determine hydraulic properties of an aquifer, involving the withdrawal or injection of measured...
- Aquiferous SystemWater circulatory system in sponges composed of choanoderm, pores and chambers.
- Aquitard1. A barrier to the flow of groundwater in an aquifer.
- Arable landLand that can be cultivated to grow crops.
- ArachisGenus of flowering plants, some of which are used for human food, including the peanut.
- ArachnidA group of animals that have four pairs of legs and a body divided into two segments. Spiders, ticks...
- Arachnida1. A class of Arthropoda that includes SPIDERS; TICKS; MITES; and SCORPIONS.
- AragoniteA mineral species of calcium carbonate (CaCO3) with a crystal structure different from that of vaterite and...
- Aragonite SkeletonSkeletons primarily composed of the aragonite form of calcium carbonate.
- ArbitrationA process for settling disputes between parties that is less structured than court proceedings. The National...
- Arbitration AssociationThe organization offering arbitration services selected by EPA to conduct arbitrations pursuant to this part.
- Arbitration (Binding and Non-Binding)A form of ADR in which an impartial individual (or panel of individuals) is authorized to review evidence...
- ArbitratorThe person appointed in accordance with § 304.22 of this part and governed by the provisions of this part.
- ArbovirusAny of a group of viruses that are transmitted between hosts by mosquitoes, ticks, and other arthropods.
- Arbuscular MycorrhizaeThe group of endomycorrhizal fungi important in non-woody plants, including many agricultural crops...
- Arch DamA concrete arch dam is used in sites where the ratio of width between abutments to height is not great and...
- ArchaeaOne of the three domains of life (the others being Bacteria and Eukarya), formerly called Archaebacteria...
- Archeological AreaU.S. Forest Service usage. Sites and areas which have been designated by the Forest Service as containing...
- Arch-Fired BoilerDry bottom boiler with circular burners, or coal and air pipes, oriented downward and mounted on waterwalls...
- Archie's LawAn empirical relationship linking formation resistivity (rt), formation water resistivity (rw) and porosity...
- ARCHITECTURAL AND ENGINEERING RECORDSDrawings and related records depicting the concepts and precise measurements needed to plan and build static...
- Architectural Coating1. Covering such as paint and roof tar that are used on exteriors of buildings.
- Architectural Coating RepackagingTo transfer an architectural coating from one container to another.
- Architectural CoatingsCoverings such as paint and roof tar that are used on exteriors of buildings.
- Architectural Coatings ImporterPerson that brings architectural coatings into the United States for sale or distribution within the United...
- Architectural DesignMethods of creating built structures, such as churches, homes, offices and other buildings.
- Architectural or Engineering Service1. Consultation, investigations, reports, or services for design-type projects within the scope of the...
- Architectural RecordDrawing and related records depicting the concepts and precise measurements needed to plan and build static...
- Archival DataInformation about trends in national, regional, state, and local repositories which may be useful in...
- ARCHIVAL MICROFILMA photographic film that meets the standards for archival film described in NARA's micrographic regulations...
- ARCHIVAL QUALITYThe ability of material, such as processed prints or film, to resist deterioration sufficiently to meet...
- ARCHIVAL STANDARDSThe standards to be met by a type of recording material or process in order for this material to have and...
- ARCHIVAL STORAGE CONDITIONSConditions suitable for preserving permanent records.
- Archive SiteThe Archive designation indicates the site has no further interest under the Federal Superfund Program based...
- ARCHIVES1. The noncurrent records of an organization preserved because of their continuing, or enduring, value...
- ARCHIVES ADMINISTRATIONThe management or direction of the program of an archival agency, including the following basic functions...
- Archiving1. In electronic records, the process of creating a backup copy of computer files, especially for long-term...
- ARCHIVISTA person responsible for, or engaged in, one or more of the functions listed under archives administration.
- ARCHIVIST OF THE UNITED STATESThe head of the National Archives and Records Administration (NARA).
- Arctic OscillationThe Arctic Oscillation is a pattern in which atmospheric pressure at polar and middle latitudes fluctuates...
- Area CoatedArea of basis material covered by each coating of enamel.
- Area CommitteeProvided for by CWA sections 311(a)(18) and (j)(4), means the entity appointed by the President consisting of...
- Area Contingency Plan1. Provided for by CWA sections 311(a)(19) and (j)(4), means the plan prepared by an Area Committee that is...
- Area frameA sampling frame obtained by dividing a region into well-defined, identifiable subregions that in aggregate...
- Area of ConcernAn area at a facility or an off-site area, which is not known to be a Solid Waste Management Unit (SWMU)...
- Area of Contamination PolicyEPA interprets RCRA to allow certain discrete areas of generally dispersed contamination to be considered...
- Area of Observed ContaminationEvaluated only in the soil exposure pathway and established based on sampling locations as follows: (1)...
- Area of Review1. The area around a deep injection well that must be checked for artificial penetrations, such as other...
- Area Processed1. Area actually exposed to process solutions. Usually this includes both sides of the metal strip.
- Area sample1. The units selected for measurements from an area frame.
- Area ServedName of the administrative jurisdiction receiving drinking water from a public water system. A public water...
- Area Source1. Any source of air pollution that is released over a relatively small area but which cannot be classified...
- Area Source Emission1. Emission from an array of pollutant sources, so widely dispersed and uniform in strength that they can be...
- Area Source ModelRepresentation of processes that emit pollutants from area sources
- Area SourcesSources of air pollution that, by themselves, generally have lower emissions than “major sources” of air...
- Area Use FactorThe ratio of an organism's home range, breeding range, or feeding/foraging range to the area of contamination...
- Area WeightingA method of apportioning data from one geographic boundary to another when the boundaries do not match. For...
- areas of concernSpecific areas of 42 tributaries to or bays in the Great Lakes where degraded environmental conditions have...
- Area-Sensitive Species1. Species that respond negatively to decreasing habitat patch size (Finch 1991:20).
- Areawide Agency1. Agency designated under section 208 of the Act, which has responsibilities for WQM planning within a...
- Areawide Air Quality Modeling AnalysisAssessment on a scale that includes the entire nonattainment or maintenance area using an air quality...
- Area-Wide MonitorAll monitors sited at neighborhood, urban, and regional scales, as well as those monitors sited at either...
- ArenavirusesA genus of negative-sense, single-stranded, RNA viruses of the family Arenaviridae that are spherical in...
- A-Renewable Identification NumberRIN verified during the interim period by a registered independent third-party auditor using a QAP that has...
- ArgasidaeA family of softbacked TICKS, in the subclass ACARI. Genera include ARGAS and ORNITHODOROS among others.
- Argillic HorizonAn argillic horizon is normally a subsurface horizon with a significantly higher percentage of phyllosilicate...
- ArginineAn essential amino acid that is physiologically active in the L-form.
- Arginine HydrochlorideThe hydrochloride salt form of arginine, an essential amino acid in juvenile humans. Arginine is a complex...
- Argon-Oxygen DecarburizationA process used for stainless steel production by reducing the amount of carbon in the steel. Used for making...
- Argon-Oxygen Decarburization VesselAny closed-bottom, refractory-lined converter vessel with submerged tuyeres through which gaseous mixtures...
2,484 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.