gravitons

graviton

[grav-i-ton]
noun Physics.
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:
1940–45; gravit(y) + -on1

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World English Dictionary
graviton (ˈɡrævɪˌtɒn)
 
n
Compare photon a postulated quantum of gravitational energy, usually considered to be a particle with zero charge and rest mass and a spin of 2

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American Heritage
Science Dictionary
graviton   (grāv'ĭ-tŏn')  Pronunciation Key 
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.
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