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| Terms for subject Environment (21507 entries) |
| quirópteros | chiropteran (Order of placental mammals comprising the bats having the front limbs modified as wings) | |
| quirópteros | chiropteran | |
| quirópteros | chiropterans | |
| R58 | may cause long-term adverse effects in the environment | |
| rabanillo | wild radish | |
| racionalización de la recogida | rationalization of the collection | |
| racor doble hembra | double female coupling | |
| racor doble macho | double male coupling | |
| radar | radar (A system using beamed and reflected radiofrequency energy for detecting and locating objects, measuring distance or altitude, navigating, homing, bombing and other purposes) | |
| radar meteorológico de suelo | ground weather radar | |
| radiación | solar radiation (The electromagnetic radiation and particles emitted by the sun) | |
| radiación | solar radiation | |
| radiación adaptante | adaptive radiation | |
| radiación alfa | alpha radiation (A stream of alpha particles which are ejected from many radioactive substances having a penetrating power of a few cm in air but can be stopped by a thin piece of paper) | |
| radiación beta | beta radiation (Name given to the ionizing radiation which is produced as a stream of high speed electrons emitted by certain types of radioactive substance when they decay. The intensity of radiation energy produced in human tissue by a beta particle is a hundred times less than that produced by an alpha radiation particle, but it travels slightly deeper into tissue) | |
| radiación beta | beta radiation | |
| radiación cósmica | cosmic radiation (Radiations consisting of atomic nuclei, especially protons, of very high energy that reach the earth from outer space. Some cosmic radiations are very energetic and are able to penetrate a mile or more into the Earth) | |
| radiación de fondo | background radiation (Radiation resulting from natural sources, as opposed to man-made sources, and to which people are exposed in everyday, normal life; for example from rocks and soil) | |
| radiación gamma | gamma radiation (Radiation of gamma rays) | |
| radiación infrarroja | infrared radiation (Electron magnetic radiation whose wavelengths lie in the range from 0.75 or 0.8 micrometer to 1000 micrometers) |