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radiotherapy, radiation therapy, radiation, actinotherapy, irradiation | [in medicine] the treatment of disease (especially cancer) by exposure to a radioactive substance | |
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radiation | the spread of a group of organisms into new habitats | |
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radiation | energy that is radiated or transmitted in the form of rays or waves or particles | |
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radiation | the act of spreading outward from a central source | |
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radiation, radioactivity | the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay | |
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radiation, radiation sickness, radiation syndrome | 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 | |
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radiation | a radial arrangement of nerve fibers connecting different parts of the brain |