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 Definitions of 'radiation':

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1. (noun) radiation
energy that is radiated or transmitted in the form of rays or waves or particles


2. (noun) radiation
the act of spreading outward from a central source


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
"he was suffering from radiation"

4. (noun) radiation, radioactivity
the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay


5. (noun) radiation
the spread of a group of organisms into new habitats


6. (noun) radiation
a radial arrangement of nerve fibers connecting different parts of the brain


7. (noun) radiotherapy, radiation therapy, radiation, actinotherapy, irradiation
(medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance



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"radiation." Definitions.net. STANDS4 LLC, 2008. 4 July. 2008. http://www.definitions.net/definition/radiation
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