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graviton

[grav-i-ton] /ˈgræv ɪˌtɒn/
noun, Physics.
1.
the theoretical quantum of gravitation, usually assumed to be an elementary particle that is its own antiparticle and that has zero rest mass and charge and a spin of two.
Compare photon.
Origin
1940-1945
1940-45; gravit(y) + -on1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for graviton
  • But there is no graviton, nor any consistent theory of quantum gravity.
  • The first question is to explain if it exists or not the graviton and if the quantum particles are waves or particles.
  • Weeks after, graviton returned, having pondered the words of karla.
British Dictionary definitions for graviton

graviton

/ˈɡrævɪˌtɒn/
noun
1.
a postulated quantum of gravitational energy, usually considered to be a particle with zero charge and rest mass and a spin of 2 Compare photon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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graviton in Science
graviton
  (grāv'ĭ-tŏn')   
A hypothetical particle postulated in supergravity theory to be the quantum of gravitational interaction, mediating the gravitational force. Like all force carriers, the graviton is a boson. It is presumed to have an indefinitely long lifetime, zero electric charge, a spin of 2, and zero rest mass (thus travelling at the speed of light). The graviton has never been detected. See also supersymmetry. See Table at subatomic particle.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for graviton

postulated quantum that is thought to be the carrier of the gravitational field. It is analogous to the well-established photon of the electromagnetic field. Gravitons, like photons, would be massless, electrically uncharged particles traveling at the speed of light and would be emitted only by highly accelerating, extremely massive objects such as stars. Since gravitons would apparently be identical to their antiparticles, the notion of antigravity is questionable.

Learn more about graviton with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Word Value for graviton

12
15
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