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nounthe spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
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"he was suffering from radiation"nounsyndrome 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
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noun(medicine) the treatment of disease (especially cancer) by exposure to a radioactive substancetype of:
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nouna radial arrangement of nerve fibers connecting different parts of the braintype of:
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nounenergy that is radiated or transmitted in the form of rays or waves or particlestype of:
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nounthe act of spreading outward from a central source
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nounthe spread of a group of organisms into new habitats
Definition that contains radiation
- uv radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
- ultraviolet radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
- beta ray radiation of beta particles during radioactive decay
- neutron radiation radiation of neutrons (as by a neutron bomb)
- nonparticulate radiation radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
- ultraviolet light radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
- background radiation radiation coming from sources other than those being observed
- beta radiation radiation of beta particles during radioactive decay
- solar radiation radiation from the sun
- ultraviolet radiation radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays