radiation

noun

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

   noun.phenomenon

   Source: WordNet 3.0

2. the act of spreading outward from a central source

   noun.act

   Source: WordNet 3.0

3. 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

   noun.state

   Examples

   He was suffering from radiation.

   Synonyms radiation sickness radiation syndrome

   Source: WordNet 3.0

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

   noun.process

   Synonyms radioactivity

   Source: WordNet 3.0

5. the spread of a group of organisms into new habitats

   noun.event

   Source: WordNet 3.0

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

   noun.body

   Source: WordNet 3.0

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

   noun.act

   Synonyms actinotherapy irradiation radiation therapy radiotherapy

   Source: WordNet 3.0

8. The act of radiating, or the state of being radiated; emission and diffusion of rays of light; beamy brightness.

   noun

   Source: webster1913