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 job of mapping the asteroid's composition and identifying all the elements falls to a gamma ray and neutron spectrometer. Jennifer Ouellette, Ars Technica, 13 Apr. 2022 Using an observatory on the edge of the Tibetan Plateau, astronomers have spotted the highest energy light ever, gamma ray photons up to 1.4 petaelectronvolts (PeV). Ling Xin, Science | AAAS, 18 May 2021 Plans call for using the telescope to probe galaxy formation and hunt for exoplanets, and training it on transient sources such as gamma ray bursts to try to pinpoint their locations. Richard Stone, Science | AAAS, 12 July 2021 The other stuff looks like an integration of exposure over a range of gamma ray energies. Rhett Allain, Wired, 25 June 2021 The new technique relies on detectors that emit light when struck by either a neutron or a gamma ray and measure the time of arrival with nanosecond precision. Richard Stone, Science | AAAS, 19 May 2021 When the gamma ray enters the shielding material, it could get absorbed—or it could get scattered and redirected into another direction. Rhett Allain, Wired, 25 June 2021 Researchers used this alert signal to observe the crash in other ways, using radio, optical, near infrared, X-ray, and gamma ray telescopes—opening up the new field of multi-messenger astronomy. Priyamvada Natarajan, The New York Review of Books, 15 June 2021 It was omitted from ERIC, following a dispute over a gamma ray source central to its facility. Edwin Cartlidge, Science | AAAS, 19 May 2021 See More

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

Learn More About gamma ray

Time Traveler for gamma ray

Time Traveler

The first known use of gamma ray was in 1903

See more words from the same year

Dictionary Entries Near gamma ray

gamma radiation

gamma ray

gamma-ray astronomy

See More Nearby Entries 

Statistics for gamma ray

Last Updated

19 Apr 2022

Cite this Entry

“Gamma ray.” Dictionary, Merriam-Webster, Accessed 17 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

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

More from Merriam-Webster on gamma ray

Nglish: Translation of gamma ray for Spanish Speakers Encyclopedia article about gamma ray


Test Your Vocabulary

Name That Color

  • a light greenish blue color
  • Name that color:
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!