gamma ray

noun
|Updated on: 13 Aug 2018

Definition of gamma ray

: a photon emitted spontaneously by a radioactive substance; also : a photon of higher energy than that of an X-ray

Recent Examples of gamma ray from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'gamma ray.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of gamma ray

1903

in the meaning defined above

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GAMMA RAY Defined for Kids

gamma ray

noun gam·ma ray \ ˈga-mə- \

Definition of gamma ray for Students

: 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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