antinucleon


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an·ti·nu·cle·on

 (ăn′tē-no͞o′klē-ŏn′, -nyo͞o′-, ăn′tī-)
n.
The antiparticle of a nucleon.

antinucleon

(ˌæntɪˈnjuːklɪˌɒn)
n
(Atomic Physics) an antiproton or an antineutron

an•ti•nu•cle•on

(ˌæn tiˈnu kliˌɒn, -ˈnyu-, ˌæn taɪ-)

n.
an antiproton or an antineutron.
[1945–50]