Noun

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