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Radiation - Dictionary Definition and Overview |
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Radiation : (noun)
1: energy that is radiated or transmitted in the form of rays
or waves or particles
2: the act of spreading outward from a central source
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" [syn: radiation
sickness, radiation syndrome]
4: the spontaneous emission of a stream of particles or
electromagnetic rays in nuclear decay [syn: radioactivity]
5: the spread of a group of organisms into new habitats
6: a radial arrangement of nerve fibers connecting different
parts of the brain
7: (medicine) the treatment of disease (especially cancer) by
exposure to radiation from a radioactive substance [syn: radiotherapy,
radiation therapy, actinotherapy, irradiation]
Based on WordNet 2.0
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Radiation : \Ra`di*a"tion\, n. [L. radiatio: cf. F. radiation.]
1. The act of radiating, or the state of being radiated;
emission and diffusion of rays of light; beamy brightness.
2. The shooting forth of anything from a point or surface,
like the diverging rays of light; as, the radiation of
heat.
Based on Webster's Revised Unabridged Dictionary
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Radiation : Radiation: 1. Rays of energy. Gamma rays and Irradiation .
Based on University of Miami School of Medicine [Medical_Dictionary]:
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Radiation : High energy particles or rays emitted during the nuclear decay processes.
Based on University of Miami School of Medicine [Medical_Dictionary]:
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