Environment terminology · MLC-0121
Environment terms: R (1,610)
- Rock jointA narrow crack in rock along which there has been no significant movement of either side. Joints commonly...
- Rock outcrop1. An area where bedrock is exposed at the Earth’s surface.
- Rock porosity1. The percentage of open spaces (pores) in rock or soil. When these spaces are interconnected, water, air...
- Rock River BasinThe Rock River Basin. Illinois, Wisconsin. Area = 10900 sq.mi.
- Rock textureThe arrangement of the minerals which make up the rock
- Rock type1. An aggregate of one or more minerals rather large in area. The three classes of rocks are the following...
- Rock wool insulationInsulation which is composed principally from fibers manufactured from slag or natural rock, with or without...
- Rock-eating fungusEctomycorrhizal fungus that break down minerals in rock, releasing these minerals into the soil for use by...
- RockerMechanical panning device comprised of three parts: a body or sluice box, a screen, and an apron.
- Rocket engineDevice consisting of a combustion chamber in which materials referred to as propellants, which provide both...
- Rocket motor bonding adhesiveAdhesive used in rocket motor bonding applications.
- Rocket motor nozzle coatingCatalyzed epoxy coating system used in elevated temperature applications on rocket motor nozzles.
- Rocket motor test siteAny building, structure, facility, or installation where the static test firing of a beryllium rocket motor...
- Rock-forming mineral1. Any naturally occurring inorganic substance found in the earth's crust as a crystalline solid.
- Rocking reverberatory furnaceReverberatory furnace which is rocked along a longitudinal axis.
- Rocky Mountain spotted feverAn acute febrile illness caused by Rickettsia rickettsii (genus Rickettsia, family Rickettsiaceae). It is...
- Rocky shoreline habitatWave-exposed coasts with a substrate of boulders, rock or cobble. Found along the ocean coast and the shores...
- Rod, wire and coilAcid pickling operations that pickle rod, wire or coiled rod and wire products.
- Rodent tularemiaA plague-like disease of rodents, transmissible to man. It is caused by Francisella tularensis and is...
- Rodenticide1. Chemical for the control of rodents
- Rodenticides, see Rodenticide
- RoeThe eggs or egg mass of a fish.
- ROE indicatorAn indicator that meets the ROE criteria and has been peer-reviewed. (See indicator.)
- Roentgen absorbed doseThe U.S. unit used to measure the amount of radiation absorbed by matter. The international equivalent is the...
- Roentgen equivalent manA U.S. unit of dose that accounts for the biological effectiveness of the type and sometimes energy of the...
- Roll bondingProcess by which a permanent bond is created between two metals by rolling under high pressure in a bonding...
- Roll coatingRoll coating is another common method that is often used for web substrates. A controlled amount of resin is...
- ROLL MICROFORMMicroform consisting of microfilm on reels, cartridges, or cassettes.
- RollboardAsbestos-containing product made of paper that is produced in a continuous sheet, is flexible, and is rolled...
- Roller kilnContinuous kiln similar to a tunnel kiln except that the unfired ceramic product travels through the kiln in...
- Rolling1. Reduction in thickness or diameter of a workpiece by passing it between lubricated steel rollers.
- Rolling average1. Average of all one-minute averages over the averaging period.
- Rolling average method(i) Step 1. Take the sum of the pounds of refrigerant added to the appliance over the previous 365-day period...
- Rolling easement1. 1. An interest in land (by title or interpretation of the Public Trust Doctrine) in which a property...
- Rolling with emulsions subcategoryCore of the rolling with emulsions subcategory shall include rolling using emulsions, roll grinding...
- Rolling with neat oils subcategoryCore of the rolling with neat oils subcategory shall include rolling using neat oils, roll grinding, sawing...
- Roll-on/Roll-offCargo that can be driven directly into the belly of the ship via ramps that are lowered to the dock, rather...
- Roll-on/Roll-off CargoCargo that can be driven directly into the belly of the ship via ramps that are lowered to the dock, rather...
- RoofThe rock immediately above a coal seam.The roof is commonly a shale, often carbonaceous and softer than rocks...
- Roof coatingCoating formulated and recommended for application to exterior roofs for the primary purpose of preventing...
- Roof height1. Maximum height of a vehicle (rounded to the nearest inch), excluding narrow accessories such as exhaust...
- Roof monitor1. Portion of the roof of a potroom where gases not captured at the cell exit from the potroom.
- Roof top unitA packaged AHU unit on the roof.
- Roofing materialMaterials used to construct a protective cover over a structure to shield its interior from the natural...
- Roofline ventsExhaust system designed to evacuate process fugitive emissions that collect in the roofline area of various...
- Rooftop detentionPractice that is designed to provide temporary storage of stormwater and slowly release stormwater runoff...
- RookeryThe nesting or breeding grounds of gregarious (i.e., social) birds or mammals; also a colony of such birds or...
- RoomSeparate part of the inside of a building, such as a bedroom, living room, dining room, kitchen, bathroom...
- Room air conditionerAir-conditioning units that typically fit into the window or wall and are designed to cool only one room.
- Room enclosureStationary structure that encloses a transfer machine system, and is vented to a carbon adsorber or an...
- Room heaterBurning gas, oil, and kerosene, any of the following heating equipment: circulating heaters, convectors...
- Root cause1. A fundamental deficiency that results in a nonconformance and must be corrected to prevent recurrence of...
- Root cause analysis1. Assessment conducted through a process of investigation to determine the primary cause, and any other...
- Root crown1. The growing point where the roots meet the stem.
- Root diseasesRoot disease is referred to as “a disease of the site” because the fungi colonize dead and dying trees and...
- Root exudateSecretions from the ends of roots that may affect the soil or neighboring plants.
- Root mean square errorA measure of statistical error calculated as the square root of the sum of squared errors, where error is the...
- Root meristemTip of the root containing undifferentiated plant cells that actively divide.
- Root noduleKnobbed structure formed from and attached to plant roots, especially of legumes, which result from symbiotic...
- Root primordiaRoot at its initial stage of development
- Root rotDecay of plant roots, due to overwatering or fungi.
- Root tipEnd of the root containing the root cap and the meristematic region.
- Root wad revetmentsLogs with attached root masses that are placed in and on streambanks to provide streambank erosion, trap...
- Root zoneThe part of the plant that is below the soil and the area surrounding it.
- Root-colonizing fungusFungal endophytes
- RootingThe process of starting new plant growth from a cutting by the growing of roots from it.
- RootstalkUnderground portion of a plant's stem, also called a rhizome.
- RootstockThe underground portion of a plant's stem, also called a rhizome.
- Rosa multifloraMultiflora rose is a thorny, perennial shrub with arching stems (canes), and leaves divided into five to...
- Rossby waveA series of troughs and ridges on quasi-horizontal surfaces in the major belt of upper tropospheric...
- Rossby wave propagation(Propagation of) a series of troughs and ridges on quasi-horizontal surfaces in the major belt of upper...
- Rotameter(RODE-uh-ME-ter) A device used to measure the flow rate of gases and liquids. The gas or liquid being...
- Rotary cameraA microfilm camera that photographs documents while they are being moved by one device in connection with...
- Rotary drillingA conventional drilling method that uses water- or air-based fluids to cool the drill bit and remove drill...
- Rotary dross coolerWater-cooled rotary barrel device that accelerates cooling of dross.
- Rotary kiln generatorIncinerator with a rotating combustion chamber that keeps waste moving, thereby allowing it to vaporize for...
- Rotary kiln incineratorAn incinerator with a rotating combustion chamber that keeps waste moving, thereby allowing it to vaporize...
- Rotary lime kilnUnit with an inclined rotating drum that is used to produce a lime product from limestone by calcination.
- Rotary parlorA raised, round rotating platform or carousel on which cows ride while being milked.
- Rotary reverberatory furnaceFurnace consisting of a refractory-lined chamber that rotates about a horizontal axis and that uses one or...
- Rotary spin1. Process used to produce wool fiberglass insulation by forcing molten glass through numerous small orifices...
- Rotary strand dryerRotary dryer operated by applying heat and used to reduce the moisture of wood strands used in the...
- Rotating basinA survey or monitoring strategy that identifies panels or subsets of basins within an area that are sampled...
- Rotating biological contactorA wastewater treatment process consisting of a series of closely spaced rotating circular disks of...
- Rotating reverberatory furnaceAn anode furnace
- Rotational cropDifferent crops planted in consecutive growing seasons to maintain soil fertility.
- RotogravureKind of intaglio printing system, using a rotary printing press.
- Rotogravure pressUnwind or feed section, which may include more than one unwind or feed station (such as on a laminator), a...
- Rotogravure print station1. Any device designed to print or coat inks on one side of a continuous web or substrate using the intaglio...
- Rotogravure printing lineAny number of rotogravure print stations and associated dryers capable of printing or coating simultaneously...
- Rotogravure printing unitAny device designed to print one color ink on one side of a continuous web or substrate using a gravure...
- RotohammersA hand-held, high-frequency impact hammer used to advance small-diameter DP rods.
- RotometerDevice which measures a liquid's flow rate. It has a tapered vertical tube with a float. The fluid force...
- Rotor1. The rotating part of a machine. The rotor is surrounded by the stationary (non-moving) parts (stator) of...
- RotsDecay or deterioration of organic material through the enzymatic activity of microorganisms.
- Rough fish1. Those fish species considered to be of poor fighting quality when taken on tackle or of poor eating...
- RoughageFeed that is high in fiber, low in digestible nutrients, and low in energy (e.g., hay, straw, silage, and...
- Roughness coefficientA factor in velocity and discharge formulas representing the effects of channel roughness on energy losses in...
- Roughness elementMaterials or forms that provide frictional resistance to the flow of water; examples include boulders...
- Round top furnaceCylindrically-shaped reverberatory furnace that has a top that is removed for charging and other furnace...
- Rounding numbers1. To round numbers according to ASTM E29-02 (incorporated by reference in § 94.5), unless otherwise...
- Rounding-off Method1. Meaning given in 40 CFR 1065.1001.
- Route1. The way a chemical or pollutant enters an organism after contact, e.g., by ingestion, inhalation, or...
- Route EPCThe EPC, based on either a statistical derivation of measured data or based on modeled data, that was...
- Route of exposure1. The way a chemical enters an organism after contact (e.g., ingestion, inhalation, or dermal absorption).
- Routine emissions1. Those releases that normally occur from a process, as opposed to accidental releases that proceed from...
- Routine maintenance areaArea, such as a boiler room or mechanical room, that is not normally frequented by students and in which...
- Routine maintenance costHow much does it cost for a single routine maintenance activity to be performed on the asset?
- Routine releaseA release that occurs during normal operating procedures or processes.
- Row cropAgricultural crop planted, usually with mechanical planting devices, in individual rows that are spaced to...
- Row crop agricultureThe rows or planting beds are far enough apart to permit the operation of machinery between them for cultural...
- Royal jellySubstance fed by honey bees to developing bee larvae.
- RoyaltyA share of the product or profit reserved by the owner for permitting another to use the property. A lease by...
- RPM examExam which evaluates individuals who provide radon measurement services in a residential environment.
- RSEI scoreA RSEI Score is a unitless value that accounts for the size of the chemical release, the fate and transport...
- Rubber camouflage specialty coatingAny specially formulated epoxy coating used as a camouflage topcoat for exterior submarine hulls and sonar...
- Rubber-based adhesiveQuick setting contact cements that provide a strong, yet flexible, bond between two mating surfaces that may...
- Rubbish1. Solid waste, excluding food waste and ashes, from homes, institutions, and workplaces.
- Rubisco(D-ribulose 1,5-bisphosphate carboxylase/oxygenase) A water soluble protein complex responsible for the...
- Rubus ellipticusHimalayan raspberry is a stout evergreen shrub with prickly stems about 12 feet long. Its thick leaves are...
- Rubus phoenicolasiusWineberry, or wine raspberry, is a typical species in the genus Rubus, which contains blackberry and...
- Rule authorization1. Allowing a well owner or operator to construct or operate an injection well as long as the requirements...
- Rule compliance factorFactor applied to discount the amount of emissions reductions credited in an implementation plan...
- Rule effectivenessThe ability of a regulatory program to achieve all the emissions reductions that could have been achieved by...
- Rule publicationRule Publication includes all activities associated with the publication of a proposed or final rule in the...
- RulemakingThe name given to the process followed by federal departments and agencies to formulate, amend, or repeal a...
- Rulemaking docketA set of documents collected and maintained specifically to provide regulatory development staff and the...
- RulemakingsRules issued by an agency, such as EPA, that translate the general mandate of a statute into a set of...
- Rule/RegulationAn authoritative requirement issued by a federal department or agency that implements a statute and has the...
- Rumen epitheliumA very thin film of tissue holding many small finger-like projections called papillae. These papillae provide...
- Rumen fungusFungal material found in the gut of ruminant animals, such as cattle
- Ruminant1. Mammal whose stomach has four parts-rumen, reticulum, omasum, and abomasum. These animals chew their cud...
- Run of foamContinuous production of foam, which may consist of several grades of foam.
- Run statusThis specifies the status of the strategy run as either "Not started", "Running", "Waiting", "Completed", or...
- "Run with the land"An expression indicating a right or restriction that affects all current and future owners of a property.
- Runaround scrapScrap materials generated on-site by aluminum casting, extruding, rolling, scalping, forging...
- RunnerRotating part of the turbine that converts the energy of falling water into mechanical energy.
- Running changeChange to a vehicle or addition of a model which occurs after certification but during vehicle production.
- Running loss1. Fuel evaporative emissions resulting from an average trip in an urban area or the simulation of such a...
- Running loss emissions1. Unburned fuel vapor that escapes from the fuel system to the ambient atmosphere while the engine is...
- Running losses, see Running loss
- Run-Off1. That part of precipitation, snow melt, or irrigation water that runs off the land into streams or other...
- Runoff1. All water flowing through streams and rivers that goes into the lakes.
- Run-of-pile triple superphosphateAny triple superphosphate that has not been processed in a granulator and is composed of particles at least...
- Run-of-RiverType of hydropower project in which limited storage capacity is available and water is released at roughly...
- Run-onAny rainwater, leachate, or other liquid that drains over land onto any part of a facility.
- Run-on Control/Runoff Management System, Functioning and MaintainedA functioning and maintained engineered system or structure designed to prevent flow into or onto a source...
- Rupture frontThe rupture front is the instantaneous boundary between the slipping and locked parts of a fault during an...
- RuralA county is considered "rural" if it does not contain a metropolitan statistical area with a population...
- Rural area1. Territory, population and housing units not classified as urban. "Rural" classification cuts across other...
- Rural Clean Water ProgramA 15-year federally sponsored nonpoint source pollution control program initiated in 1980 as an experimental...
- Rural populationTerritory, population and housing units not classified as urban. "Rural" classification cuts across other...
- Rural transportation landLand cover/use category which consists of all highways, roads, railroads and associated right-of-ways outside...
- Rust diseases1. (Diseases caused by) rust fungi (Basidiomycota, Uredinales) which are the largest group of fungal plant...
- Rust fungusThe rust fungi are a monophyletic group of approximately 7000 species in the basidiomycota and are highly...
- Rust preventative coatingCoating formulated and recommended for use in preventing the corrosion of ferrous metal surfaces in...
- RustsRed or brown disease spots on plants caused by fungi.
- RutA depression in access roads made by continuous passage of logging vehicles.
1,610 of 29,894 terms in Environment terminology (MLC-0121). Request the full dataset.