radiation
(noun)
noun
1. energy that is radiated or transmitted in the form of rays or waves or particles
Definition categories: phenomenon, energy
2. the act of spreading outward from a central source
Definition categories: act, emanation, emission
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
- he was suffering from radiation
Definition categories: state, syndrome
4. the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
Similar word(s): radioactivity
Definition categories: process, emission
5. the spread of a group of organisms into new habitats
Definition categories: event, spread, spreading, action, activity
6. a radial arrangement of nerve fibers connecting different parts of the brain
Definition categories: body
7. (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance
Similar word(s): actinotherapy, irradiation, radiotherapy