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gluon

[gloo-on] /ˈglu ɒn/
noun, Physics.
1.
an unobserved massless particle with spin 1 that is believed to transmit the strong force between quarks, binding them together into baryons and mesons.
Origin of gluon
1970-1975
1970-75; glue + -on1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for gluon

gluon

/ˈɡluːɒn/
noun
1.
a hypothetical particle believed to be exchanged between quarks in order to bind them together to form particles
Word Origin
C20: from glue + -on
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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gluon in Science
gluon
  (gl'ŏn)   
The subatomic particle that mediates the strong force. The exchange of gluons between two quarks changes the color of the quarks and results in the attractive force holding them together in hadrons. Gluons are bosons. See Table at subatomic particle.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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