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

Examples of gamma ray in a Sentence

Recent Examples on the Web

With a reliable source of gamma rays, scientists could perform all kinds of experiments, including trying to produce some of the more exotic types of matter in the universe. Avery Thompson, Popular Mechanics, "Large Hadron Collider Accelerates Whole Atoms for the First Time," 30 July 2018 Specifically, gamma ray bursts in the violent department and fast radio bursts in the eerie department. Rob Reid, Ars Technica, "Ars on your lunch break: Getting high and breaking faith," 17 Oct. 2018 Suspects have included neutron stars, gamma ray bursts, hypernovae, and the radiation-spewing black holes at the center of some galaxies, but whatever the source, high energy neutrinos are a likely byproduct. Daniel Clery, Science | AAAS, "Ghostly particle caught in polar ice ushers in new way to look at the universe," 12 July 2018 The detection also triggered a powerful example of another new trend, multimessenger astronomy, in which telescopes and other instruments studied the flaring blazar in all parts of the electromagnetic spectrum, from gamma rays to radio waves. Daniel Clery, Science | AAAS, "Ghostly particle caught in polar ice ushers in new way to look at the universe," 12 July 2018 For example, compare the early EGRET gamma ray observatory, which flew in the 1990s, to NASA’s flagship mission Fermi, which turns 10 this year. Eileen Meyer, Smithsonian, "Big Data is Transforming How Astronomers Make Discoveries," 15 May 2018 His gamma ray detector is used in nuclear research. New York Times, "Robert N. Hall, 96, Whose Inventions Are Everywhere, Is Dead," 10 May 2018 That's good news because while our ozone layer protects us from most gamma rays, a powerful burst would be far too much to handle. Eric Limer, Popular Mechanics, "Learn the Basics of Gamma Ray Bursts in 7 Minutes," 2 Aug. 2016 Perplexingly, however, Fermi had observed no corresponding flare in gamma rays. Mark Bowen, Scientific American, "Neutrinos on Ice: Astronomers' Long Hunt for Source of Extragalactic "Ghost Particles" Pays Off," 12 July 2018

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.

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First Known Use of gamma ray

1903, in the meaning defined above

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Last Updated

15 Jan 2019

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Time Traveler for gamma ray

The first known use of gamma ray was in 1903

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More Definitions for gamma ray

gamma ray

noun
gam·​ma ray | \ ˈga-mə-\

Kids Definition of gamma ray

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

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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More from Merriam-Webster on gamma ray

Rhyming Dictionary: Words that rhyme with gamma ray

Spanish Central: Translation of gamma ray

Nglish: Translation of gamma ray for Spanish Speakers

Britannica.com: Encyclopedia article about gamma ray

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