1. (noun) radiation
energy that is radiated or transmitted in the form of rays or waves or particles
Synonyms: radiation sickness, radioactivity, actinotherapy, irradiation, radiotherapy, radiation therapy, radiation syndrome
2. (noun) radiation
the act of spreading outward from a central source
Synonyms: radiation sickness, radioactivity, actinotherapy, irradiation, radiotherapy, radiation therapy, radiation syndrome
3. (noun) radiation sickness, radiation syndrome, radiation
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
Synonyms: radiation sickness, radiation syndrome, radiation, radiation therapy, actinotherapy, radiotherapy, radioactivity, irradiation
4. (noun) radiation, radioactivity
the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
Synonyms: radiation sickness, radiation syndrome, radiation, radioactivity, radiation therapy, actinotherapy, radiotherapy, irradiation
5. (noun) radiation
the spread of a group of organisms into new habitats
Synonyms: radiation sickness, radioactivity, actinotherapy, irradiation, radiotherapy, radiation therapy, radiation syndrome
6. (noun) radiation
a radial arrangement of nerve fibers connecting different parts of the brain
Synonyms: radiation sickness, radioactivity, actinotherapy, irradiation, radiotherapy, radiation therapy, radiation syndrome
7. (noun) radiotherapy, radiation therapy, radiation, actinotherapy, irradiation
(medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance
Synonyms: radiation sickness, radiation syndrome, beam of light, light beam, radiation, shaft, ray of light, beam, ray, radiation therapy, actinotherapy, radiotherapy, radioactivity, irradiation, shaft of light
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Synonyms for radiation 
