Definitions for radiation
The noun radiation has 7 senses? (first 2 from tagged texts)
(energy that is radiated or transmitted in the form of rays or waves or particles)
(the act of spreading outward from a central source)
(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)
(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 a radioactive substance)
