anti-neutron

antineutron

[an-tee-noo-tron, -nyoo-, an-tahy-]
noun Physics.
1.
an elementary particle having no charge and having a mass and spin equal to that of the neutron but with magnetic moment opposite to that of the neutron; the antiparticle of the neutron.
adjective
2.
Also, anti-neutron. opposing the building, stockpiling, or use of neutron bombs: The antineutron lobby was outnumbered.

Origin:
1940–45; anti- + neutron

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World English Dictionary
antineutron (ˌæntɪˈnjuːtrɒn)
 
n
the antiparticle of a neutron; a particle having the same mass as the neutron but a magnetic moment of opposite sign

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
antineutron   (ān'tē-n'trŏn', ān'tī-)  Pronunciation Key 
The antiparticle that corresponds to the neutron.
The American Heritage® Science Dictionary
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