gamma ray


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

The Fermi telescope watches the sky for gamma rays. Chris Lee, Ars Technica, "Gamma ray evidence for dark matter outshone by a flock of pulsars," 10 Aug. 2018 Excess gamma rays from the center of our own galaxy were, for a while, thought to be a possible signature of dark matter. Chris Lee, Ars Technica, "Pulsars could convert dark matter into something we could see," 20 Dec. 2018 The primary benefit for accelerating atoms with electrons attached is that the electrons can generate high-energy gamma rays, which are the most powerful light waves possible. Avery Thompson, Popular Mechanics, "Large Hadron Collider Accelerates Whole Atoms for the First Time," 30 July 2018 Superluminal The neutron-star collision was picked up nearly simultaneously by the Fermi Space Telescope, which detected gamma rays produced during the collision, and the LIGO/VIRGO gravitational-wave detectors, which named the event GW170817. John Timmer, Ars Technica, "Neutron-star merger blasted a jet of material through the debris," 5 Sep. 2018 Six other high-energy gamma rays did not coincide with ejections, which mostly occur at solar max. Shannon Hall, Scientific American, "The Sun Is Spitting Out Strange Patterns of Gamma Rays—and No One Knows Why," 28 Mar. 2018 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

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

23 Apr 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

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


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 Encyclopedia article about gamma ray

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a sum of money that is sent as a payment

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