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Definition of parton - 2 dictionary results
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par⋅ton

  [pahr-ton]
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–noun Physics.
a constituent of the nucleon originally postulated in the theoretical analysis of high-energy scattering of electrons by nucleons and subsequently identified with quarks and gluons.
Origin:
1965–70; part(icle) + -on 1 ; coined by R. P. Feynman
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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par·ton   (pär'tŏn')   
n.  Any of the point particles believed to be a constituent of hadrons, now known as quarks. No longer in technical use.

[part(icle) + -on1.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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