Environment terminology · MLC-0121

Environment terms: L (1,023)

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• La NiñaA natural variability in ocean water surface pressure that causes periodic changes in ocean surface...
• La Paz AgreementAgreement between the United States of America and the United Mexico States on Cooperation for the protection...
• Lab on a ChipMicrofluidic device for biomedical diagnostics or environmental monitoring which carries out chemical...
• Lab PackDrum filled with many small containers packed in nonbiodegradable absorbent materials.
• Lab PacksDrums filled with many small containers packed in nonbiodegradable absorbent materials.
• Lab Process WaterWater used for laboratory experiments and procedures.
• Label1. Any written, printed, or graphic matter affixed to or appearing upon any automobile refinish coating or...
• Labeled Compound1. A molecule in which one or more of the atoms is isotopically enriched, thereby increasing the mass of the...
• Labeled Injection Internal Standard1. A labeled compound spiked into the concentrated extract immediately prior to injection of an aliquot of...
• Labile Carbon1. The highly reactive fraction of soil organic carbon with the most rapid turnover times; its oxidation...
• Labor ForceThe labor force includes all people classified in the civilian labor force, plus members of the U.S. Armed...
• Labor RelationsLabor Relations manages the relationship between the agency and its unions and bargaining units. This...
• Labor Surplus AreaGeographical area identified by the Department of Labor in accordance with 20 CFR part 654, subpart A, as an...
• Labor Surplus Area FirmA concern that together with its first-tier subcontractors will perform substantially in labor surplus areas...
• Labor unionAn organization of workers formed to serve members’ collective interests with regard to wages and working...
• Laboratory Accreditation BodyAB that accredits conformity assessment body testing laboratories.
• Laboratory AnalysisOriginal test result for each analysis that was used to determine a product's properties.
• Laboratory AnimalCreatures reared or kept for at time in the scientific laboratory environment for experimentation purposes
• Laboratory Animal StudiesInvestigations using animals as surrogates for humans.
• Laboratory Animal StudyInvestigations using animals as surrogates for humans.
• Laboratory ChemicalChemicals necessary to perform experimental and/or investigative procedures and for the preparation of drugs...
• Laboratory Control Sample1. A sample matrix, free from the analytes of interest, spiked with verified known amounts of analytes or a...
• Laboratory Duplicate1. The analysis or measurements of the variable of interest performed identically on two sub-samples of the...
• Laboratory Duplicate(s)1. The analysis or measurements of the variable of interest performed identically on two sub-samples of the...
• Laboratory ExperimentType of experiment that takes place in a location under controlled conditions, such as a laboratory.
• Laboratory FacilityPlace where experimentation and analysis, generally in a science, are performed.
• Laboratory Fortified Blank1. An aliquot of reagent water or other blank matrix to which known quantities of the method analytes and all...
• Laboratory Fortified Blank (radiochemistry)The LFB consists of a volume of a blank matrix to which a known activity of a radioisotope is added. The LFB...
• Laboratory Fortified Sample Matrix1. An aliquot of a preserved environmental field sample to which known quantities of the method analytes are...
• Laboratory Fortified Sample Matrix DuplicateA second aliquot of the preserved environmental field sample used to prepare the LFSM which is fortified...
• Laboratory Fortified Sample Matrix Duplicate (radiochemistry)A third aliquot of a field sample that has the same quantity of radionuclide(s) added to it as the LFSM. The...
• Laboratory Fortified Sample Matrix (radiochemistry)A second aliquot of a field sample that has a known quantity of the radionuclide(s) being measured added to...
• Laboratory Gene AmplificationA selective increase in the number of copies of a gene coding for a specific protein without a proportional...
• Laboratory Method BlankA quality control sample to assess background contamination or interference from media, reagents, equipment...
• Laboratory MouseMice which are being used or are intended for use for research, testing, experimentation, or exhibition...
• Laboratory Non-RodentAny live or dead dog, cat, nonhuman primate, guinea pig, hamster, rabbit, or any other warm blooded animal...
• Laboratory Protocol1. A series of formal steps for conducting a test.
• Laboratory QuantitationMeasurement of the concentration of an analyte obtained by using a specified laboratory procedure.
• Laboratory RatSmall mammal of the genus Rattus, the animal most commonly used the laboratory for experimental purposes.
• Laboratory Reagent Blank1. An aliquot of reagent water or other blank matrix that is treated exactly as a sample including exposure...
• Laboratory Reagent Blank (radiochemistry)The LRB consists of an aliquot of a blank matrix that is prepared and analyzed and results calculated exactly...
• Laboratory studies1. Targeted research conducted to better understand the ultimate fate and transport of chemical contaminants...
• Laboratory StudyTargeted research conducted to better understand the ultimate fate andtransport of chemical contaminants of...
• Laboratory TechnicianPerson with responsibility for preparing reagents and supplies used in the laboratory and in the field.
• Laboratory TestingThe use of the sampling and testing methodology prescribed in § 84.5(i)(3) by a laboratory that is accredited...
• Laboratory TypeFacility that analyzes samples for PCBs and is unaffiliated with any entity whose activities involve PCBs.
• LaborerJobs in this category include workers with more limited skills who require only brief training to perform...
• Lab-Sample CustodianPerson with responsibility for overseeing the possession, exchange, and storage of reagents, sample(s)...
• LachrymatorA substance which increases the flow of tears
• Lack of Health InsurancePercent of all persons without Health Insurance Coverage.
• Lacquer1. Thermoplastic coating which dries primarily by solvent evaporation, and which is resoluble in its original...
• Lacrimal ApparatusThe tear-forming and tear-conducting system which includes the lacrimal glands, eyelid margins, conjunctival...
• LacrimationSecretion and discharge of tears
• LactateTo secrete or produce milk.
• Lactate Dehydrogenase1. A family of homotetrameric cytoplasmic enzymes involved in the conversion of L-lactate and NAD to pyruvate...
• Lactational ExposureContact with a substance through lactation.
• Lactic Acid BacteriaBacteria which make lactic acid and are used to ferment milk to make cheeses and other dairy foods
• LacustrinePertaining to, produced by, or formed in a lake.
• Lacustrine System1. Wetlands and deepwater habitats occurring in the Lacustrine System, one of five systems in the...
• Ladle Transfer StationFacility where molten iron is emptied from the railroad torpedo car or hot metal car to the shop ladle. This...
• LagThe distance a nuclear logging probe moves during one time constant.
• Lagoon1. A shallow, artificial treatment pond where sunlight, bacterial action, and oxygen work to purify...
• Lagoon ChannelA generally narrow passage way, open on both ends, through a shoal. In coral reef settings this feature...
• Lagoonal EstuaryThis class of estuary tends to be shallow, highly enclosed, and have reduced exchange with the ocean. They...
• Lagrangian FrameworkA mathematical modeling framework based on a moving reference point in contrast to a fixed coordinate...
• Lag-timeThe span of time between the adoption of a pollution-reducing practice and the visible effects of that...
• Lake1. In EMAP, a standing body of water greater than 1 hectare (about 2.5 acre) that has at least 1000 m2 (about...
• Lake and Flowing WaterInland surface waters that have been classified as Class I (Potable Water Supplies) or Class III (Recreation...
• Lake Champlain BasinScope Note: Use for Lake Champlain (Vermont and New York) and its surrounding watershed.
• lake effect zone1. The area within the tributary where the water of Lake Erie and the river are mixed. This is typically the...
• Lake Superior Basin Outstanding International Resource WatersThose waters designated as such by a Tribe or State consistent with the September 1991 Bi-National Program to...
• Lake Superior Basin Outstanding National Resource WatersThose waters designated as such by a Tribe or State consistent with the September 1991 Bi-National Program to...
• Lake Superior Bioaccumulative Substances of Immediate ConcernA list of substances identified in the September 1991 Bi-National Program to Restore and Protect the Lake...
• lakeplainThe old lake bottom of the ancestral Great Lakes.
• Lake/ReservoirNatural or man made basin or hollow on the Earth’s surface in which water collects or is stored that may or...
• LakesUsually a large body of water surrounded by land.
• Lambda1. A measure of association; a statistic used with nominal variables.
• Lambert's azimuthal map projectionThe map projection used for laying out the EMAP grid. This is an equal-area projection.
• LaminaeA thin strata or platelike structure, as one of the layers of sensitive vascular tissue between the bone and...
• LaminateA transparent coating applied to printed sheets to give either a shiny (gloss) or neutral (matt) finish...
• Laminated FabricFabric composed of a high-strength reinforcing base fabric between two plies of flexible thermoplastic film...
• Laminated PaperboardBoard made from one or more plies of kraft paper bonded together, with or without facers, that is used for...
• Laminated ProductProduct in which a wood or woody grass veneer is affixed to a particleboard core or platform, a...
• Laminated Product Producer1. Manufacturing plant or other facility that manufactures (excluding facilities that solely import products)...
• Laminated Strand LumberComposite product formed into a billet made of thin wood strands cut from whole logs, resinated, and pressed...
• Laminated Veneer LumberComposite product formed into a billet made from layers of resinated wood veneer sheets or pieces pressed...
• LaminatingApplying a material to a substrate using heat and pressure.
• LaminationLamination is the binding and fusing of multiple layers with heat and pressure. All thermosets can be used as...
• LaminitisCrippline and painful inflammatory condition of the tissues that bond the hoof wall to the pedal (coffin)...
• Lamp1. A light source composed of a metal base, a glass tube filled with an inert gas or a vapor, and base pins...
• LampsLamp, also referred to as "universal waste lamp" is defined as the bulb or tube portion of an electric...
• LanaiThe drainage on the island of Lanai; and associated waters. Hawaii. Area = 140 sq.mi.
• LandFlows that represent the earths surface, including water bodies [Original source...
• Land Acquisition PhaseAn initial project phase, preceding land development and construction. In this stage, financing is assembled...
• Land Application1. Discharge of wastewater onto the ground for treatment or reuse. (See: irrigation)
• Land Application AreaLand under the control of an AFO owner or operator, whether it is owned, rented, or leased, to which manure...
• Land application systemsThe addition of biosolids to soil to supply nutrients and replenish soil organic matter.
• Land Application UnitArea where wastes are applied onto or incorporated into the soil surface (excluding manure spreading...
• Land Application WastewaterThe reuse of reclaimed water or the use or disposal of effluents or wastewater residuals on, above, or into...
• land appliedThe reuse of reclaimed water or the use or disposal of effluents or wastewater residuals on, above, or into...
• Land Applied Sewage SludgeLand application of sewage sludge.
• Land BanPhasing out of land disposal of most untreated hazardous wastes, as mandated by the 1984 RCRA amendments.
• Land CapabilityU.S. Soil Conservation Service usage. The inherent ability of land to be used without permanent damage. Land...
• Land Conservation SubsidyDirect payments to landowners to encourage the environmentally-desired land usage.
• Land Cover1. Anything that exists on and is visible from above the earth's surface. Examples include water, vegetation...
• Land DevelopmentThe second project phase, following land acquisition and preceding construction. During this phase, raw land...
• Land Development PhaseThe second project phase, following land acquisition and preceding construction. During this phase, raw land...
• Land Disposal1. Land disposal is defined in Title 40 of the Code of Federal Regulations Section 268.2(c) as "placement in...
• Land Disposal Restrictions1. Mandated by the 1984 amendments to RCRA; prohibits the disposal of hazardous wastes into or on the land.
• Land Farming (of Waste)A disposal process in which hazardous waste deposited on or in the soil is degraded naturally by microbes.
• Land FlowFlows that represent the earths surface, including water bodies [FEDEFL].
• Land MethodThe conventional method for calculating uncertainty in the mean concentration (e.g., 95% UCL) when the sample...
• Land Mobile ServiceA public or private radio service providing two-way communication, paging and radio signaling on land.
• Land Monitoring & ForecastingThe monitoring of lands, soils, and ground water to assess current land, soils, and ground water...
• Land Occupancy FireFire started as a result of land occupancy for agricultural purposes, industrial establishment, construction...
• Land Regulatory LocalityGeographic areas and localities consisting of dry land in the United States which are defined by a variety of...
• Land RemediationThe return of land to the original uncontaminated state.
• Land ReuseRepurposing land so that it can be used differently
• Land RevitalizationRestoring contaminated and potentially contaminated sites to productive economic and greenspace use. Land...
• Land ShearingA site preparation method that involves the cutting of brush, trees, or other vegetation at ground level...
• Land Treatment FacilityFacility or part of a facility at which hazardous waste is applied onto or incorporated into the soil...
• Land Treatment UnitA site where physical, chemical, and biological processes occurring in the topsoil layers (e.g., naturally...
• Land Treatment UnitsAlso known as land farms, land treatment units involve the application of hazardous waste on the soil...
• Land Treatment ZoneSoil layer in the unsaturated zone of a land treatment unit within which hazardous substances are intended to...
• Land Treatment/Application FarmingLand treatment is a disposal method in which a waste containing an EPCRA Section 313 chemical is applied onto...
• Land TypeA feature on the landscape with a generally uniform shape and set of physical characteristics; often created...
• Land use1. The way land is used by humans. Forest, agricultural land and urban/suburban land are all land uses.
• Land Use Planning1. The process of evaluating and categorizing different activities occurring in a particular area, the human...
• Land Use RegulationsIncludes requirements, permits, codes/regulations to uses of land, includes matters related to zoning and...
• Land use (secondary flow context)Primary use based on human activity or naturally occurring community of flora and fauna in a habitat...
• Land-Applied BiosolidSewage sludge that is disposed of by putting it on land.
• Land-Based UnitArea where hazardous secondary materials are placed in or on the land before recycling. This definition does...
• Landfarm/Land TreatmentA method of waste management in which liquid wastes or sludges are spread over land and tilled or liquids are...
• Landfill1. A method for final disposal of solid waste on land. The refuse is spread and compacted and a cover of soil...
• Landfill CapA layer of clay, or other impermeable material installed over the top of a closed landfill to prevent entry...
• Landfill Capacity ModificationIncrease in the permitted volume design capacity of the landfill by either lateral or vertical expansion...
• Landfill Carbon StorageBiogenic materials in a landfill are not completely decomposed by anaerobic bacteria, and some of the carbon...
• Landfill CellDiscrete volume of a hazardous waste landfill which uses a liner to provide isolation of wastes from adjacent...
• Landfill ClosurePoint in time when a landfill becomes a closed landfill. [40 CFR 60.751 (CFR 2013)]
• Landfill Gas1. Landfill gas is created when organic waste in a municipal solid waste landfill decomposes. This gas...
• Landfill Gas Collection System1. System of pipes used to collect landfill gas from different locations in the landfill by means of a fan or...
• Landfill Gas EmissionEmission from LFG is created as solid waste decomposes in a landfill. This gas consists of about 50 percent...
• Landfill ModificationIncrease in the permitted volume design capacity of the landfill by either horizontal or vertical expansion...
• Landfill StatusLandfills categorized by operating status.
• Landfill UnitArea of land or an excavation in which wastes are placed for permanent disposal, that is not a land...
• Landfill WastewaterAll wastewater associated with, or produced by, landfilling activities except for sanitary wastewater...
• Landfill Working Capacity1. For the purposes of subpart TT of this part, means the maximum volume or mass of waste that is actually...
• Landfill-freeAll waste (or at least 90 percent) generated from operations is reused, recycled, or converted to energy.
• Landfilling1. The disposal of solid waste at engineered facilities in a series of compacted layers on land and the...
• Landfills1. Sanitary landfills are disposal sites for nonhazardous solid wastes spread in layers, compacted to the...
• LandformAny physical, recognizable form or feature of the earth's surface having a characteristic shape and produced...
• LandholderA landholder is an individual or legal entity owning or leasing land subject to the acreage limitation...
• landingA place in or near the forest where logs are gathered for further processing or transport.
• Landing (log deck)A place in or near the forest where logs are gathered for further processing, sorting, or transport.
• LandlineTraditional wired phone service.
• Landlord portAt a landlord port, the port authority owns the wharves, which it then rents or leases to a terminal operator...
• Landsat 7 SatelliteLandsat 7 is a U.S. satellite used to acquire remotely sensed images of the Earth's land surface and...
• Landscape1. The surface of the earth, encompassing the water and vegetation upon it, as produced or modified by...
• Landscape Characterization1. Documentation of the traits and patterns of the essential elements of the landscape.
• Landscape ComplementationChanges in population caused by the relative distributions of habitat patches containing nonsubstitutable...
• Landscape DevelopmentChanging the landscape through agriculture, industry, or building homes.
• Landscape Ecology1. The study of the distribution patterns of communities and ecosystems, the ecological processes that affect...
• Landscape IndexIndexes of landscape structure (pattern), including richness, evenness, patchiness, diversity, dominance...
• Landscape IndicatorA measurement of the landscape, calculated from mapped or remotely sensed data, used to describe spatial...
• Landscape RedevelopmentDevelopment of sites with existing structures or impervious surfaces. Redevelopment does not include projects...
• Landscape SupplementationChanges in populations caused by the distribution of habitat patches containing substitutable resources in a...
• Landscape Water ReuseUse of recycled water for the irrigation of parks, golf courses, road medians, and other landscapes. This...
• Landscape-Level Geomorphological FeatureThese large features - generally on the scale of hundreds of square kilometers - can cross tectonic settings...
• Landscape-related water reuseThe use of recycled water for the irrigation of parks, golf courses, road medians, and other landscapes. This...
• LandscapingThe design of outdoor space to serve the needs of people by planting, altering the contours of the ground...
• Landslide1. Downslope movement of rock, soil, and mud.
• Langelier Index1. An index reflecting the equilibrium pH of a water with respect to calcium and alkalinity. This index is...
• Langmuir CirculationRotational oscillatory motion of surface waters induced by wind and Coriolis deflection. This circulation is...
• Language Spoken at HomeThe language currently used by respondents at home, either "English only" or a non-English language which is...
• LansoprazoleA 2,2,2-trifluoroethoxypyridyl derivative of timoprazole that is used in the therapy of stomach ulders and...
• Large Appliance Assembly PlantFactory where the various product parts are put together to make the complex product. Products are generally...
• Large Appliance Part1. Any organic surface-coated metal lid, door, casing, panel, or other interior or exterior metal part or...
• Large Appliance Product1. Any organic surface-coated metal range, oven, microwave oven, refrigerator, freezer, washer, dryer...
• Large Appliance Surface Coating LinePortion of a large appliance assembly plant engaged in the application and curing of organic surface coatings...
• Large Blast FurnaceBlast furnace with a working volume of greater than 2,500 m3.
• Large Capacity CesspoolsLarge capacity cesspools are defined in the Code of Federal Regulations Section 144.81(2) as cesspools for...
• Large Commercial AircraftAircraft of more than 110,000 pounds, maximum certified take-off weight manufactured for non-military use.
• Large Commercial and Industrial ChillerEquipment designed to produce chilled water for use in commercial or industrial HVAC systems.
• Large Concentrated Animal Feeding OperationAn AFO is defined as a Large CAFO if it stables or confines as many or more than the numbers of animals...
• Large Construction ActivityAs defined at 40 CFR 122.26(b)(14)(x), a large construction activity includes clearing, grading, and...
• Large Control Device1. Control device that controls total HAP emissions of greater than or equal to 10 tons/yr, before control...
• Large Cottonseed PlantVegetable oil production process that processes 120,000 tons or more of cottonseed and other listed oilseed...
• Large Foundry1. For an existing affected source, an iron and steel foundry with an annual metal melt production greater...
• Large GeneratorRefers to commercial businesses, institutions, or industries that generate sufficient quantities of municipal...
• Large Glycol Dehydration Unit1. Glycol dehydration unit with an actual annual average natural gas flowrate equal to or greater than 283.0...
• Large Hard Chromium Electroplating FacilityFacility that performs hard chromium electroplating and has a maximum cumulative potential rectifier capacity...
• Large Hospital/Medical/Infectious Waste Incinerator1. Except as provided in (2);(i) An HMIWI whose maximum design waste burning capacity is more than 500 pounds...
• (Large) Hydroelectric PowerThe process of generating electricity by harnessing the power of moving water is called hydroelectricity...
• Large Intestine1. A muscular tube that extends from the end of the small intestine to the anus.
• Large MammalMammals considerable larger than human beings, such as the elephant, rhinoceros, lions, among many others
• Large Municipal Waste Combustor PlantMunicipal waste combustor plant with a municipal waste combustor aggregate plant capacity for affected...
• Large Point SourcePoint source that processes a total annual raw material production of fruits, vegetables, specialties and...
• Large Quantity Generator1. Person or facility which generates more than 2,200 pounds of hazardous waste per month. In 1989, only 1%...
• Large Quantity Generators1. Facilities that generate more than 1,000 kg (2,200 lb) of hazardous waste per calendar month, or more than...
• Large Quantity Handler of Universal WasteMeans a universal waste handler (as defined in this section) who accumulates 5,000 kg (11,000 lb) or more...
• Large Quantity Handlers of Universal WasteHandlers that accumulate a total of 5000 kg or more of universal waste at any one time.
• Large Release EventPlanned or unplanned uncontrolled release to the atmosphere of gas, liquids, or mixture thereof, from wells...
• Large River Bioassessment ProtocolAn integrated approach to sampling in that the protocols for algae, benthic macroinvertebrates, and fish can...
• Large Spark-Ignition EngineRelating to engines that are subject to evaporative emission standards in 40 CFR part 1048.
• Large Urban and Built Up AreaA land cover/use category composed of developed tracts of at least 10 acres - meeting the definition of urban...
• Large Water System1. A water system that serves more than 50,000 persons.
• large woody debrisAlso called large wood structures. A large tree part, conventionally a piece greater than 10 cm in diameter...
• Large-Capacity Septic System1. An onsite method of partially treating and disposing of sanitary wastewater having the capacity to serve...
• Large-Capacity Septic SystemsClass V wells that dispose of sanitary waste through a septic tank and are used by multiple dwellings...
• Larger Biogenic GeoformPhysical features and landforms that were created by the action of living organisms (bioherms). These...
• Larger Oceanic GeoformPhysical, coastal and seafloor structures that are generally no larger than hundreds of square kilometers in...
• Large-Sized PlantPlants which process more than 10,430 kg/day (23,000 lbs/day) of raw materials.
• Large-Volume User1. A water customer, usually industrial or wholesale, whose usage is substantial relative to other users...
• Larva1. The tiny, newly hatched stage of many insects and aquatic animals.
• LarvipositionThe deposition of living larvae previously hatched inside the female
• Laryngeal CartilageThe nine cartilages of the larynx, including the cricoid, thyroid and epiglottic, and two each of arytenoid...
• Laryngeal MucosaThe mucous lining of the larynx, consisting of various types of epithelial cells ranging from stratified...
• Laryngeal MuscleThe striated muscle groups which move the larynx as a whole or its parts, such as altering tension of the...
• LaryngospasmSpasmodic closure of the larynx
• Larynx1. The muscular and cartilage structure situated at the top of the trachea (windpipe) and below the root of...
• Laser Induced Breakdown SpectroscopyType of atomic emission spectroscopy in which a laser is used to ionize and excite the material whose...
• laser induced fluorescence1. A method for measuring the relative amount of soil and/or groundwater contamination with an in situ...
• Laser-Induced Fluorescence SensorA cone penetrometer mounted sensor that is a real-time, in situ, field screening method for petroleum...
• LassitudeWeakness; exhaustion
• Last Date RecordedIn the Aggregate Data Summary, this value is the most recent Sample End Date for the specified parameter...
• Last Modified DateThe date and time when the strategy was last modified.
• Last readingThe depth of the shallowest value recorded on a log.
• Late Life ExposureContact with a substance by swallowing, breathing, or touching the skin or eyes by persons aged 65 or older
• Latency1. Time from the first exposure to a chemical until the appearance of a toxic effect.
• Latency Period1. The time between first exposure to an agent and manifestation or detection of a health effect of interest.
• latent infection1. A period in which the infection is present in the host without causing overt symptoms. (from Online...
• LateralSecondary or side channel, ditch, or conduit.
• Lateral AccessRight to walk or otherwise move along a shoreline, once someone has reached the shore.
• Lateral Expansion1. Horizontal expansion of the waste boundaries of an existing MSW landfill. A lateral expansion is not a...
• Lateral log1. A multielectrode, resistivity-logging technique that has a much greater radius of investigation than the...
• Lateral MoraineA ridge-like moraine carried on (and deposited at) the side margin of a valley glacier. It is composed...
• Lateral Move Irrigation InfrastructureInfrastructure to distribute water through a series of pipes, each with a wheel and a set of sprinklers...
• Lateral SewerSewer which connects the collector sewer to the interceptor sewer.
• Lateral SewersPipes that run under city streets and receive the sewage from homes and businesses, as opposed to domestic...
• Laterolog1. A focused-resistivity logging technique; see also guard log.
• LatewoodThe portion of the growth ring that is formed after the earlywood formation has ceased. It is usually denser...
• Latex PaintWater-based decorative or protective covering having a latex binder.
• Latex Resin1. Resin which is produced by a polymerization process which initiates from free radical catalyst sites and...
• Latin Hypercube SamplingA variant of the Monte Carlo sampling method that ensures selection of equal numbers of values from all...
• Latino IndividualFor 2010 Census: People who identify with the terms “Hispanic,” “Latino,” or “Spanish” are those who classify...
• Latitude1. The angular distance north or south of the earth's equator along a meridian of longitude.
• Latitudinal MigrationMovement in which species change latitudes, i.e. move from north to south or from south to north.
• Launder Off-Gas SystemSystem that collects chlorine and hydrochloric acid fumes from collection points within the melt/reactor...
• Laundering Weir1. (LAWN-der-ing weer) Sedimentation basin overflow weir. A plate with V-notches along the top to assure a...
• Launders(LAWN-ders) Sedimentation basin and filter discharge channels, consisting of overflow weir plates (in...
• Laundry PrewashProduct that is designed for application to a fabric prior to laundering and that supplements and contributes...
• Laundry Starch ProductProduct that is designed for application to a fabric, either during or after laundering, to impart and...
• Lava1. An extrusive magma, or a molten rock that has flowed onto the surface of the earth or other planetary...
• Lava Field/PlainA relatively well-defined area that is covered by lava flows. These can be found either along the coast or in...
• Law Enforcement1. Law Enforcement involves activities to protect people, places, and things from criminal activity resulting...
• Law Enforcement VehicleAny vehicle which is primarily operated by a civilian or military police officer or sheriff, or by personnel...
• Lawn and Garden EngineSpark-ignition engine under 19kW
• Lawn and Garden InsecticideInsecticide product designed primarily to be used in household lawn and garden areas to protect plants from...
• Lawn EdgingBarrier used between lawns and landscaped areas or garden beds to prevent grass roots or weeds from spreading...
• Laws and RegulationsMaterials and content related to the legal and regulatory responsibilities and programs of the agency...
• Layer of Lower Relative Hydraulic ConductivityA geologic material with lower hydraulic conductivity than adjacent geologic materials. If used to establish...
• Layered Base AmendmentAlkaline (base) materials that are interlayered with acid generating materials in ord er to provide a measure...
• Layered HazeHaze produced when air pollution from multiple line, area or point sources is transported long distances to...
• Layered Protective MeasureRather than focusing on a single measure for mitigation, a layered approach uses an array of measures...
• LayoutA rendition that shows the placement of all the elements, images, thumbnails etc., of a final printed piece.
• Lc Detection1. Critical Value (Lc) Smallest measured amount or concentration of analyte in a sample that gives rise to a...
• LC Detection (Layperson's Definitions)1. Critical Value (LC) - The minimum result which can be reliably discriminated from a blank (for example...
• LC Detection (Statistical Definitions)1. Critical Value (LC) - Smallest measured amount or concentration of analyte in a sample that gives rise to...
• LC50The concentration of a chemical in air or water which is expected to cause death in 50% of test animals...
• LC₅₀ (Median Lethal Concentration)The concentration of a material in an environmental medium that causes 50% mortality of a group of test...
• LCA nomenclature glossaryTerms related to the nomenclature, but not necessary part of the organizational structure.
• Ld Detection1. The Minimum Detectable Value (Ld) - Once Lc is established, Ld is the smallest concentration or amount of...
• LD Detection (Layperson's Definitions)1. Detection Limit (LD) - The lowest true concentration that will almost always be detected.
• LD Detection (Statistical Definitions)1. The Minimum Detectable Value (LD) - Once LC is established, LD is the smallest concentration or amount of...
• LD50The dose of a chemical taken by mouth or absorbed by the skin which is expected to cause death in 50% of the...
• LeachThe downward transport of dissolved or suspended minerals, fertilizers, pesticides and other substances by...
• leach padThe surface upon which ore is piled for heap leaching, including those facilities to collect the lixiviant...
• Leach TestingProcedure to determine to what extent some of a solid material will be released into a contacting fluid.
• Leachate1. Liquid (mainly water) that percolates through a landfill and has picked up dissolved, suspended, and/or...
• Leachate Collection System1. A system that gathers leachate and pumps it to the surface for treatment.
• Leachate Detection Collection and Removal SystemA liner system functions to intercept leachate or gas migrating within a landfill and routes it to a...
• Leachate RecirculationPractice of taking the leachate collected from the landfill and reapplying it to the landfill by any of one...
• Leaching1. The process by which soluble substances are dissolved and transported down through the soil by recharge.
• Leaching fieldThe entire area where many materials (including contaminants) dissolve in rain, snowmelt, or irrigation water...
• Lead1. A heavy metal that is hazardous to health if breathed or swallowed. Its use in gasoline, paints, and...
• Lead (2008 standard)1. Description: Lead (2008 standard)
• Lead AbatementAbatement is a specialized activity designed to address lead in the home. Lead abatement projects are...
• Lead Acid Battery1. An electrochemical battery that uses lead and lead oxide for electrodes and sulfuric acid for the...
• Lead AdditiveAny substance containing lead or lead compounds.
• Lead Additive ManufacturerAny person who produces a lead additive or sells a lead additive under his own name.
• Lead Administrative Trustee1. Facilitates effective and efficient communication during response operations between the OSC and the other...
• Lead Agency1. Agency that provides the OSC/RPM to plan and implement response actions under the NCP. EPA, the USCG...
• Lead AlloyAlloy in which the predominant component is lead.
• Lead Bearing MaterialMaterial with a lead content equal to or greater than 5 mg/l as measured by EPA Method 1311 (Under Method...
• Lead by Example TargetA lead by example greenhouse gas (GHG) target for government operations is a commitment to reduce government...
• Lead by Example--Clean Energy Goals for Public FacilitiesClean energy purchasing or generation goals require facilities to obtain a certain percentage of electricity...
• Lead by Example--Energy Efficiency and Alternative Fuel Goals for Public FleetsState lead by example measures for public fleets are structured in a number of ways, including establishing...
• Lead by Example--Energy Efficiency in Public FacilitiesA policy to promote energy efficiency in public facilities can be structured in various ways. For example, a...
• Lead by Example--Energy Efficient Appliance and Equipment Purchase Requirements for Public FacilitiesThese standards require that equipment purchased for or installed in public facilities meet certain energy...
• Lead Compounds (*)Includes any unique chemical substance that contains lead as part of that chemical's infrastructure.
• Lead Contamination Control ActTo amend the Safe Drinking Water Act to control lead in drinking water.
• Lead Federal AgencyDefined by the FRERP, activates the FRERP for any peacetime radiological emergency which, based upon its...
• Lead isotope ratio methodologyA method that measures different lead isotopes in children's blood and/or urine, food, water, and house dust...
• Lead OrganizationOrganization with the primary responsibility of leading a removal or response action at a site.
• Lead Oxide Manufacturing FacilityFacility that produces lead oxide from lead, including product recovery.
• Lead Paint1. The environmental burden indicator for lead paint is based on the percentage of housing units built before...
• Lead PoisoningLead used to be in paint and gasoline. Lead can still be found in contaminated soil, household dust, drinking...
• Lead RecipeGlass product composition of the following ranges of weight proportions: 50 to 60 percent silicon dioxide, 18...
• Lead Reclamation FacilityFacility that remelts lead scrap and casts it into lead ingots for use in the battery manufacturing process...
• Lead RefinerAny facility that refines lead metal that is not located at a primary lead processor.
• Lead RemelterAny facility that remelts lead metal that is not located at a primary lead processor.
• Lead Service Line1. A service line made of lead which connects the water main to the building inlet and any lead pigtail...
• Lead State AgencyThe state agency which has the legal authority and oversight responsibilities to implement the permit program...
• Lead Status Unknown Service LineService line that has not been demonstrated to meet or not meet the SDWA Section 1417 definition of lead...
• Lead Trigger LevelParticular concentration of lead in water that prompts certain activities under subpart I of this part. The...
• Lead-Acid BatteriesRefers to batteries used in automobiles, trucks, and motorcycles. They contain plastic, lead (a toxic metal)...
• Lead-Acid Battery Manufacturing PlantAny plant that produces a storage battery using lead and lead compounds for the plates and sulfuric acid for...
• Lead-Based PaintPaint or other surface coatings that contain lead equal to or exceeding 1.0 milligram per square centimeter...
• Lead-Based Paint HazardHazardous lead-based paint, dust-lead hazard or soil-lead hazard as identified in § 745.65.
• Lead-Based Paint Poisoning Prevention ActTo provide Federal financial assistance to help cities and communities to develop and carry out intensive...
• Leaded GasolineGasoline which is produced with the use of any lead additive or which contains more than 0.05 gram of lead...
• Leaded SteelSteel that must meet a minimum specification for lead content (typically 0.25 percent or more) and for which...
• Leadership in Energy & Environmental PerformanceA series of voluntary standards developed by the US Green Building Council (USGBC) through which facilities...
• Leadership in Energy and Environmental Design1. A Rating System that is administered by the US Green Building Council (USGBC) and is currently the most...
• Leadership in Energy and Environmental Design CertificationA program sponsored by the United States Green Building Council that creates standards for developing high...
• Lead-Free HomeHomes that are free of hazards from lead, such as lead based paint or lead in water pipes.
• LeadingSpace between lines of type. The distance in points between one baseline and the next.
• Leading OrganizationOrganization with the primary responsibility of leading a removal or response action at a site.
• LeafA usually green, flattened, lateral structure attached to a stem and functioning as a principal organ of...
• Leaf AbscissionThe physiological foliage loss in response to natural environmental cycles.
• Leaf BudA structure composed of a short stem with embryonic leaves, with bud primordial in the axils and at the apex...
• Leaf ConductanceThe passage of water vapor and carbon dioxide through the leaf stomata.
• leaf litterAlso called duff. Leaves and twigs fallen from forest trees.
• LeafletSegment of compound leaf.
• Leak1. Any of several events that indicate interruption of confinement of vinyl chloride within process...
• Leak DetectionMethods for identifying water leakage in pipes and fittings.
• Leak DetectorA tool or technique used to detect leaking underground storage tanks, landfills, pipes, pumps, etc. In...
• Leak Repair1. Equipment is adjusted, or otherwise altered, in order to eliminate a leak as defined in the applicable...
• Leak TestingGenerally, checking the integrity of a container and looking for leaks or flaws.
• LeakageRefers to cases in which residential recyclables are collected outside of a municipal collection system. As a...
• Leak-Detection System1. System capable of detecting the failure of either the primary or secondary containment structure or the...
• LeakingAny instance in which a PCB Article, PCB Container, or PCB Equipment has any PCBs on any portion of its...
• Leaking Underground Fuel Storage TankA UST is a tank and any underground piping connected to the tank that is used to contain gasoline or other...
• Leaking Underground Storage Tank1. A underground storage tank is a tank and any underground piping connected to the tank that is used to...
• Leaks & SpillsAccidental releases of hazardous substances.
• Lean Burn EngineTwo-stroke or four-stroke spark ignited reciprocating internal combustion engine that does not meet the...
• Lean Premix Stationary Combustion TurbineAny stationary combustion turbine where the air and fuel are thoroughly mixed to form a lean mixture for...
• Leap Frog MigrationA pattern of migration taken when subspecies of the same species occupy two or more breeding areas (and also...
• Learn the IssuesEducational and consumer information as well as general or basic information related to all topics...
• Leasable Mineral1. Oil, gas, coal, oil shale, phosphate, sodium, potassium, sulphur, asphalt, or gilsonite.
• leasable mineralsA legal term that identifies a mineral or mineral commodity that is leasable by the federal government under...
• Lease-Purchase AgreementAgreement that allows public entities to finance purchases and installation over long-term periods using...
• Lease-Purchase AgreementsAn agreement that allows public entities to finance purchases and installation over long-term periods using...
• Least CostAn algorithm to develop a control strategy that assigns measures to various sources to achieve a specified...
• Least Cost CurveAn algorithm to develop a control strategy that iteratively performs least-cost runs at multiple percentage...
• Least Developed CountryA country with low indicators of socioeconomic development and human resources, as well as economic...
• Least disturbed conditionDescribes minimally impacted conditions.
• Least Impaired Days1. Average visibility impairment (measured in deciviews) for the twenty percent of monitored days in a...
• Least Squares1. A statistical procedure that estimates the values of dose-response parameters such that the sum of squares...
• Least-Cost Planning ProcessEnergy conservation and electric power planning methodology meeting the requirements of § 73.82(a)(4) of this...
• Leather and Allied Product ManufacturingEstablishments in the Leather and Allied Product Manufacturing subsector transform hides into leather by...
• LeavesRefers to the foliage of a plant. Excludes brush, branches, and grass. (Mish et al., 1988)
• Lee WaveThe wavelike effect, characterized by severe updrafts and downdrafts, that occurs in the lee of a mountain...
• LEED rating systemA building certification process, established by the U.S. Green Building Council, which looks at various...
• Leeside LowExtratropical cyclones that form on the downwind (lee) side of a mountain chain. In the United States, they...
• Leeward WallFurthest exterior wall of a total enclosure that is opposite the windward wall.
• LegOne of the two lower extremities in humans used for locomotion and support.
• Leg BandsCloth or plastic strips of a bright color used for marking treated cows, fresh cows, or cows needing special...
• Legacy Coal Combustion Residuals Surface ImpoundmentCCR surface impoundment that no longer receives CCR but contained both CCR and liquids on or after October...
• Legacy MaterialUnclassified information that an agency marked as restricted from access or dissemination in some way, or...
• Legacy PollutionChemicals that remain in the environment long after they were first introduced. Often, these chemicals were...
• Legacy STORET LevelLegacy STORET breakdown of station type qualifiers into six levels. Each has a table that can be viewed from...
• Legacy STORET Station TypeThe text code that preserves the encoded legacy station type field. This value can be decoded to determine...
• LEGAL AND FINANCIAL RIGHTS RECORDSLegal and financial rights records are that type of vital records essential to protect the legal and...
• Legal Defense CostAny expenses that an insurer incurs in defending against claims of third parties brought under the terms and...
• Legal PrivilegeInformation related to any work-product privilege, attorney-client privilege, governmental privilege, or...
• Legal Privilege Information - BasicAttorney-client privilege and/or attorney work-product privilege information.
• Legal RequirementA requirement promulgated by federal, state, or local authorities.
• Legal ServicesLegal Services includes all legal support services, such as through an Office of General Counsel, to support...
• LEGAL VALUEThe usefulness of records in documenting legally enforceable rights or obligations, both those of the Federal...
• Legally Privileged InformationInformation related to any work-product privilege, attorney-client privilege, governmental privilege, or...
• LeghemoglobinA hemoglobin-like oxygen binding heme protein present in the nitrogen fixing root nodules of leguminous...
• Legionella1. A genus of bacteria, some species of which have caused a type of pneumonia called Legionaires Disease.
• Legionella pneumophilaA species of gram-negative, aerobic bacteria that is the causative agent of LEGIONNAIRES' DISEASE. It has...
• Legionnaires DiseaseAn acute, sometimes fatal, pneumonia-like bacterial infection characterized by high fever, malaise, muscle...
• Legislative Materials - BasicInformation related to Congressional inquiries or proposed/pending legislation.
• Legislative RelationsLegislative Relations involves all activities aimed at the development, tracking, and amendment of public...
• Legislative TestimonyLegislative Testimony involves activities associated with providing testimony/evidence in support of, or...
• Legislative TrackingLegislative Tracking involves monitoring legislation from introduction to enactment.
• LegumeAny of thousands of plant species that have seed pods that split along both sides when ripe. Some of the more...
• LeguminosaeA family of plants that includes many valuable food and forage species such as peas, beans, soybeans...
• Leishmaniasis1. A parasitic infection caused by protozoa of the genus Leishmania. It is transmitted to humans via the bite...
• LemmaIn grasses, the lower, generally larger of two sheathing bracts that occur directly below a flower.
• LenderNon-Federal qualified institutional buyer (as defined in 17 CFR 230.144A(a)), known as Rule 144A(a) of the...
• LensA homogeneous parcel of water that - by composition - maintains coherence within water of different...
• Lens of the EyeA biconvex transparent structure of the eye through which light is focused on the retina. The lens sits...
• Lentic WaterPond or lake (standing water) (USGS Water Science Glossary of Terms]
• Lentic watersPonds or lakes (standing water).
• Lepidium drabaCrowds out native species.
• Lepidium latifoliumPerennial pepperweed (synonym: Cardaria latifolia (L.) Spach), is also known as tall whitetop, giant...
• Leptodiaptomus sicilisType of copepod.
• LeptospirosisInfections with bacteria of the genus Leptospira.
• Lesion1. A pathological or traumatic discontinuity of tissue or loss of function of a part.
• Lespedeza cuneataChinese lespedeza is a warm season, perennial herbaceous plant. It has an erect growth form, ranging from...
• Less Hazardous Synthetic DesignDesign syntheses to use and generate substances with little or no toxicity to either humans or the...
• Less Than "<"This indicates that the limitation is less than the value presented in the CFR.
• Lessons LearnedKnowledge derived from the implementation and evaluation of a program that can be used to identify strengths...
• LetdownThe process in a cow where physical stimulation causes a release of oxytocin and the contraction of smooth...
• Lethal1. Causing death by direct action.
• Lethal Concentration1. Median level concentration, a standard measure of toxicity. It tells how much of a substance is needed to...
• Lethal Concentration 501. A concentration of a pollutant or effluent at which 50% of the test organisms die; a common measure of...
• Lethal Concentration 50 Percent1. Median level concentration, a standard measure of toxicity. It tells how much of a substance is needed to...
• Lethal Concentration LowThe lowest concentration at which death occurred.
• Lethal Concentration₅₀A calculated concentration of a chemical to which exposure for a specific length of time is expected to cause...
• lethal doseThis term applies to the dose that will cause death in x% of the population receiving the dose (e.g., LD50...
• Lethal Dose 501. The dose of a toxicant that will kill 50% of test organisms within a designated period of time. The lower...
• Lethal Dose Low1. the lowest dose in an animal study at which lethality occurs.
• Lethal Dose₅₀A calculated dose of a chemical expected to cause death in 50% of a defined experimental animal population...
• Lethal YellowingSymptoms that are characteristic of diseases caused by phytoplasmas include yellowing of leaves, reduced size...
• LethargyA condition of abnormal drowsiness or torpor; a great lack of energy; apathy.
• Letter ContractWritten preliminary contractual instrument that authorizes the contractor to begin immediately manufacturing...
• Letter of CreditA credit document issued to an owner and operator to cover the TSDF financial assurance requirement.
• LetterpressPrinting that utilizes inked raised surfaces, usually type, to create the image.
• Letterpress PressPrinting press which produces prints by relief printing, using an inked raised surface
• LetterspacingThe addition of space between typeset letters.
• Leukemia1. A malignant (clonal) hematologic disorder, involving hematopoietic stem cells and characterized by the...
• Leukemia Inhibitory Factor1. Leukemia Inhibitory Factor (LIF) affects many systems, including hematopoietic, embryonic, bone, hepatic...
• Leukocyte1. Blood cells that are devoid of hemoglobin, capable of ameboid motion and phagocytosis, and act as the...
• Leukocyte Apoptotic ProcessAny apoptotic process that is observed in leukocytes.
• Leukocyte Trafficking InductionLeukocyte Trafficking Induction involves initiation of circulation of white blood cells from the blood stream...
• Leukocyte Trafficking InhibitionLeukocyte Trafficking Inhibition involves interference with, or restraint of, circulation of white blood...
• LeukopeniaReduction in the number of leukocytes in the blood
• LeukostasisA disorder involving the aberrant infiltration and aggregation of leukocytes into the vasculature of the...
• Leukotriene Activity InductionThrough increased production or release, or inhibited degradation, Leukotriene Activity Induction involves...
• Leukotriene Activity InhibitionThrough decreased production or release, or enhanced degradation, Leukotriene Activity Inhibition involves...
• Leukotriene DegradationLeukotriene Degradation consists of conjugation, transport, and/or oxidation of a family of oxidative...
• Leukotriene ProductionLeukotriene Production consists of synthesis of a family of oxidative derivatives of arachidonic acid...
• Leukotriene Receptor BindingA process that involves the non-covalent binding of leukotrienes to one of three leukotriene receptors. These...
• levee1. A wall, generally of earthen materials, designed to prevent the flooding of a river after periods of...
• Levee DeltaA delta having the form of a long, narrow ridge that resembles a natural levee.
• Level 1 AssessmentEvaluation to identify the possible presence of sanitary defects, defects in distribution system coliform...
• Level 2 AssessmentEvaluation to identify the possible presence of sanitary defects, defects in distribution system coliform...
• Level ControlsA float device (or pressure switch) which senses changes in a measured variable and opens or closes a switch...
• Level gauging systems and alarmsAny engineering control that indicates the level of liquid inside the tank and that is installed on tanks to...
• Level I Concentration for the Surface Water PathwayLevel I concentrations are established in samples in which the concentration of a hazardous substance that...
• Level I Concentrations for the Air Migration PathwayLevel I concentrations are established at sampling locations where the concentration of at least one...
• Level I Concentrations for the Drinking Water ThreatLevel I concentrations are established in aqueous samples in which the concentration of at least one...
• Level I Concentrations for the Environmental ThreatLevel I concentrations are established in samples in which the concentration of at least one hazardous...
• Level I Concentrations for the Ground Water PathwayLevel I concentrations are established for samples from drinking water wells in which the concentration of a...
• Level I Concentrations for the Human Food Chain ThreatLevel I concentrations are established for tissue samples from aquatic human food chain organisms in which...
• Level II Concentration for the Surface Water PathwayLevel II concentrations are established in samples in which the concentration of at least one hazardous...
• Level II Concentrations for the Air Migration PathwayLevel II concentrations are established at sampling locations where the concentration of at least one...
• Level II Concentrations for the Drinking Water ThreatLevel II concentrations are established for samples in which the concentration of at least one hazardous...
• Level II Concentrations for the Environmental ThreatLevel II concentrations are established for samples in which the concentration of at least one hazardous...
• Level II Concentrations for the Ground Water PathwayLevel II concentrations are established for samples from drinking water wells in which the concentration of...
• Level II Concentrations for the Human Food Chain ThreatLevel II concentrations are established in aqueous samples, sediment samples, or tissue samples from...
• Level of ConcernThe concentration in air of an extremely hazardous substance above which there may be serious immediate...
• Level of ControlNational regulations for industrial wastewater discharges set technology-based numeric limitations for...
• Level of Detection2 micrograms per gram from any resolvable gas chromatographic peak, i.e. 2 ppm.
• Level of MeasurementRefers to the four levels of variables and their empirical attributes - nominal, ordinal, interval, and ratio.
• Level of QuantitationLowest concentration at which HDDs/HDFs can be reproducibly measured in a specific chemical substance within...
• Level of ServiceThe characteristics of system performance such as "how much", "of what nature", and "how frequently", with...
• Level of SignificanceThe probability that observed or greater differences occur by chance.
• Leveling SiteThe site is leveled (if necessary) with a bulldozer and/or a grader.
• Lewis Y Antigen BindingLewis Y Antigen Binding involves non-covalent interaction of a molecule through intermolecular physical...
• Lewisite1. A lethal war gas which is a vesicant, lacrimator and lung irritant
• Lewy Body DiseaseA progressive form of dementia characterized by the presence of protein deposits called Lewy bodies in the...
• Liabilities1. Damages that may result from an unexpected release of contaminants into the environment.
• Liability1. Under Superfund, a party responsible for the presence of hazardous waste at a site is also legally...
• Liability LimitsThe sum or sums beyond which an insurance company does not protect the insured on a particular policy (i.e...
• Libby Amphibole AsbestosThe term used in this document to identify the mixture of amphibole mineral fibers of varying elemental...
• Liberated MethaneReleased from coal and surrounding rock strata during the mining process. This includes both methane emitted...
• LibraryAn unordered collection of clones (i.e., cloned DNA from a particular organism) whose relationship to each...
• Library Dependent MethodMethod that requires the development of a source library.
• Library Independent MethodMethod that does not require the development of a source library.
• Library ServicesActivities to operate agency libraries providing traditional library functions such as access to journals...
• LicenseAny license or permit granted by an agency of the Federal Government to conduct any activity which may result...
• Licensed SiteArea contained within the boundary of a location under the control of persons generating or storing uranium...
• Licensing AgencyAny agency of the Federal Government to which application is made for a license or permit.
• Lichen Algal LayerThe photosynthetic partner in the lichen; Examples include green algae and blue-green algae.
• Lichen ApotheciaThe most common sexual reproduction structure of the lichen’s fungal partner, it is cup-shaped or disc-shaped...
• Lichen Biosynthetic PathwayBiosynthetic pathways in a symbiotic relationship
• Lichen Body StructureMakeup of lichen always includes fungi and algae, and sometimes also cyanobacterium
• Lichen IsidiumA vegetative means of propagation for lichens; normally found on the top-side or outer cortex of the lichen...
• Lichen MetabolismTransfer of nutrients/metabolites from the alga to the heterotrophic fungus
• Lichen MorphologyOrganism generally recognized as a single "plant" that consists of a fungus and an alga or cyanobacterium...
• Lichen ReproductionSexual or asexual reproduction of lichens
• Lichen SorediumA vegetative means of propagation for lichens. Both fungus and alga are intertwined into a granule-like mass...
• Lichen SporeIn lichens, produced by the mycobiont only for sexual reproduction; a tiny uni- or multi-cellular structure...
• Lichen TomentumColorless hyphae that look like short fuzz or hairs on the outside of the lichen.
• Lidar1. An instrument similar to a radar but uses a laser to generate light pulses rather than radio waves...
• Lien on Potentially Responsible Party PropertyA legal action against potentially responsible party (PRP) site owners establishing a lien on property that...
• Life Cycle1. Consecutive and inter-linked stages of a product system, from raw material acquisition or generation of...
• Life Cycle Assessment1. A life cycle assessment (LCA) is a process for evaluating the environmental burdens associated with a...
• Life Cycle Cost1. The amortized annual cost of a product, including capital costs, installation costs, operating costs...
• Life Cycle Costing1. Summing all the costs both recurring and nonrecurring, related to a product, structure, system, or service...
• Life Cycle Impact AssessmentThe phase of life cycle assessment which evaluates potential environmental impacts of a product, process, or...
• Life Cycle InventoryA process of quantifying energy and raw material requirements, atmospheric emissions, waterborne emissions...
• Life Cycle of a ProductAll stages of a product's development, from extraction of fuel for power to production, marketing, use, and...
• LIFE CYCLE OF RECORDSThe management concept that records pass through three stages: creation, maintenance and use, and...

1,023 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.