Antiparticle

A subatomic particle with the same-size properties as those of the particle although some may have the opposite sign. The positron is the antiparticle of the electron.

Bosons also have antiparticles except for those that have zero value for all charges, for example a photon or a composite boson made from a quark and its corresponding antiquark. In this case there is no distinction between the particle and the antiparticle, they are the same object.

See also: Annihilation, Antimatter, Antiquark, Pair Annihilation, Pair Production, Positron.