ALL meanings of antiparticle
an·ti·par·ti·cle
A a - noun antiparticle any of a group of elementary particles that have the same mass and spin as their corresponding particle but have opposite values for all other nonzero quantum numbers. When a particle collides with its antiparticle, mutual annihilation occurs 3
- noun antiparticle any of the constituent particles of antimatter 3
- noun antiparticle A subatomic particle having the same mass as a given particle but opposite electric or magnetic properties. Every kind of subatomic particle has a corresponding antiparticle, e.g., the positron has the same mass as the electron but an equal and opposite charge. 1
- noun antiparticle a particle all of whose properties, as mass, spin, or charge, have the same magnitude as but, where appropriate, the opposite sign of a specific elementary particle; neutral pions, photons, and gravitons are considered to be their own antiparticles: The positron is the antiparticle of the electron. Compare antimatter, annihilation (def 3). 1
- noun antiparticle (physics) 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. 0