noun🔗Share反粒子A subatomic particle corresponding to another particle with the same mass, spin and mean lifetime but with charge, parity, strangeness and other quantum numbers flipped in sign; a particle that has a reversed world line to another."When matter and antiparticles meet, they annihilate each other, releasing energy. "物質と反粒子が出会うと、互いに消滅し、エネルギーを放出します。physicsscienceChat with AIVocabulary GamePractice Reading