(Science: radiobiology) propagation of energy through space. In the context of this report, it is electromagnetic radiation (x-rays or gamma rays) or corpuscular radiation (alpha particles, electrons, protons, neutrons) capable of producing ionisation. The spread of a group of organisms into new habitats.A radial arrangement of nerve fibers connecting different parts of the brain.(medicine) the treatment of disease (especially cancer) by exposure to radiation from a radioactive substance.Syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; greater exposure can cause sterility and cataracts and some forms of cancer and other diseases; severe exposure can cause death within hours; he was suffering from radiation.The spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay.Electromagnetic energy that travels at the speed of light.

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