radiation

noun

1. 1

   (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance

2. 2

   the act of spreading outward from a central source

3. 3

   a radial arrangement of nerve fibers connecting different parts of the brain

4. 4

   the spread of a group of organisms into new habitats

5. 5

   energy that is radiated or transmitted in the form of rays or waves or particles

6. 6

   the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay

7. 7

   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