noun🔗ShareAntiparticulesA 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. "Lorsque la matière et les antiparticules se rencontrent, elles s'annihilent, libérant de l'énergie.physicsscienceChat with AIVocabulary GamePractice Reading