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| Terms for subject Environment (5179 entries) |
| radioactive substance (Any substance that contains one or more radionuclides of which the activity or the concentration cannot be disregarded as far as radiation protection is concerned) | substància radiactiva | |
| radioactive tracer (A radioactive isotope which, when injected into a biological or physical system, can be traced by radiation detection devices, permitting determination of the distribution or location of the substance to which it is attached) | traçador radiactiu | |
| radioactive tracer technique | tècnica de traç radiactiu | |
| radioactive waste (Any waste that emit radiation in excess of normal background level, including the toxic by-products of the nuclear energy industry) | residu radiactiu | |
| radioactive waste management (The total supervision of the production, handling, processing, storage and transport of materials that contain radioactive nuclides and for which use, reuse or recovery are impractical) | gestió de residus radioactius | |
| radioactivity (The property possessed by some atomic nuclei of disintegrating spontaneously, with loss of energy through emission of a charged particle and/or gamma radiation) | radioactivitat | |
| radioelement (An element that is naturally radioactive) | cos simple radioactiu | |
| radionuclide (A nuclide that exhibits radioactivity) | radionúclid | |
| radon (A radioactive gaseous element emitted naturally from rocks and minerals where radioactive elements are present. It is released in non-coal mines, e.g. tin, iron, fluorspar, uranium. Radon is an alpha particle emitter as are its decay products and has been indicted as a cause of excessive occurrence of lung cancer in uranium miners. Concern has been expressed at radon levels in some housing usually adjacent to granite rocks or old tin mining regions) | radó | |
| rag (Discarded textile waste, either post-consumer waste or pre-consumer waste, such as manufacturing process scraps) | drap | |
| rail traffic (The movement and circulation of vehicles transporting goods and people on railroad systems) | trànsit ferroviari | |
| rail transport (Transportation of goods and persons by railway) | transport ferroviari | |
| railroad vehicle | vehicle ferroviari | |
| railway (A permanent track composed of a line of parallel metal rails fixed to sleepers, for transport of passengers and goods in trains) | ferrocarril | |
| railway network (The whole system of railway distribution in a country) | xarxa ferroviària | |
| railway station (A place along a route or line at which a train stops to pick up or let off passengers or goods, especially with ancillary buildings and services) | estació ferroviària | |
| rain (Precipitation in the form of liquid water drops with diameters greater than 0.5 millimeter) | pluja | |
| rain forest (A forest of broad-leaved, mainly evergreen, trees found in continually moist climates in the tropics, subtropics, and some parts of the temperate zones) | bosc humit | |
| rain water (Water which falls as rain from clouds) | aigua pluvial | |
| rain water sewer system (Channels for clearing away rain water) | clavegueram d'aigües pluvials |