反粒子
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
他の粒子と同じ質量をもつが、その他の特性では反対の値をもつ粒子 対消滅と放射エネルギーの生産にをもたらす素粒子の相互作用と反粒子