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[noo-klee-on, nyoo-] /ˈnu kliˌɒn, ˈnyu-/
noun, Physics.
a proton or neutron, especially when considered as a component of a nucleus.
1935-40; nucle(us) + -on1
Related forms
nucleonic, adjective
internucleon, adjective
internucleonic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for internucleonic


a proton or neutron, esp one present in an atomic nucleus
Word Origin
C20: from nucle(us) + -on
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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internucleonic in Medicine

nucleon nu·cle·on (nōō'klē-ŏn', nyōō'-)
A proton or a neutron, especially as part of an atomic nucleus.

nu'cle·on'ic adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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internucleonic in Science
A proton or a neutron, especially as part of an atomic nucleus.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for internucleonic


either of the subatomic particles, the proton and the neutron, constituting atomic nuclei. Protons (positively charged) and neutrons (uncharged) behave identically under the influence of the short-range nuclear force, both in the way they are bound in nuclei and in the way they are scattered by each other. This strong interaction is independent of electric charge. Unstable subatomic particles heavier than nucleons (hyperons and baryon resonances) have a nucleon among their final decay products; the nucleon is thus the baryon ground state. The antinucleons include the antiproton and the antineutron.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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