Definition of
Radiation
- (noun, phenomenon) energy that is radiated or transmitted in the form of rays or waves or particles
- (noun, act) the act of spreading outward from a central source
- (noun, state) 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, process) the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
- (noun, event) the spread of a group of organisms into new habitats
- (noun, body) a radial arrangement of nerve fibers connecting different parts of the brain
- (noun, act) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance
via WordNet, Princeton University
Synonyms of Radiation
actinotherapy, irradiation, radiation sickness, radiation syndrome, radiation therapy, radioactivity, radiotherapy
Alternate forms of Radiation
Derivations: radiate
Hyponyms: adaptive radiation, bombardment, corpuscular radiation, cosmic radiation, curietherapy, electromagnetic radiation, electromagnetic wave, ionizing radiation, nonparticulate radiation, particulate radiation, phototherapy, radium therapy, solar radiation, x-ray therapy
Hypernyms: action, activity, emanation, emission, energy, free energy, natural action, natural process, neural structure, spread, spreading, syndrome, therapy
Origin of the word Radiation
- 1555, from L. radiationem (nom. radiatio) "a shining, radiation," noun of action from radiare "to beam, shine," from radius "beam of light" (see radius). more
via Online Etymology Dictionary, ©2001 Douglas Harper
Words that sound like Radiation
radian, radium, radome, radon, raetam, ratan, ration, rattan, ready money, red man, red onion, red wine, redden, redeem, retain, retama, retem, retina, retinene, retinue, rewrite man, rhodium, rhodymenia, rhythm, roadman, rodin, root on, rotation, rotenone, rotten, routine, ruritania, ruritanian, ruthenium
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