名詞 antiparticle:

1. a particle that has the same mass as another particle but has opposite values for its other properties; interaction of a particle and its antiparticle results in annihilation and the production of radiant energy

an.ti.par.ti.cle

n.（名詞）
A subatomic particle, such as a positron, an antiproton, or an antineutron, having the same mass, average lifetime, spin, magnitude of magnetic moment, and magnitude of electric charge as the particle to which it corresponds but having the opposite sign of electric charge, opposite intrinsic parity, and opposite direction of magnetic moment.See table at subatomic particle
反粒子：一種亞原子粒子，如正電子、反質(zhì)子或反中子，與它相對應(yīng)的粒子有相同的質(zhì)量、平均壽命、核量子數(shù)、磁矩量和電荷量，但具有相反的電荷標(biāo)志、內(nèi)在均勢和磁矩方向參見 subatomic particle