antineutrino

(an′tī no̵̅o̅ trēnō; -tē-, -ti-)

noun

the antiparticle of the neutrino, with no charge and a rest mass close to zero: it is emitted during radioactive decay

See antineutrino in American Heritage Dictionary 4

noun pl. an·ti·neu·tri·nos
The antiparticle of the neutrino.

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