Dictionary

gamma ray

noun

Definition of GAMMA RAY

:  a photon emitted spontaneously by a radioactive substance; also :  a photon of higher energy than that of an X-ray
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First Known Use of GAMMA RAY

1903

Rhymes with GAMMA RAY

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GAMMA RAY Defined for Kids

gamma ray

noun gam·ma ray \ˈga-mə-\

Definition of GAMMA RAY for Kids

:  a ray that is like an X-ray but of higher energy and that is given off especially by a radioactive substance
Medical Dictionary

gamma ray

noun

Medical Definition of GAMMA RAY

:  a photon emitted spontaneously by a radioactive substance; also :  a high-energy photon—usually used in plural

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