• (medicine) the treatment of disease (especially cancer) by exposure to Radiation from a radioactive substance
• the act of spreading outward from a central source
• a radial arrangement of nerve fibers connecting different parts of the brain
• the spread of a group of organisms into new habitats
• energy that is radiated or transmitted in the form of rays or waves or particles
• the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
• 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

'Radiation' in other languages