Particle Physics a positively charged lepton with the same mass and magnitude of charge as the electron; the antiparticle of an electron
Origin of positronposi(tive) + (elec)tron
An elementary particle having the same mass and magnitude of charge as an electron but exhibiting a positive charge; the antiparticle of the electron. Also called antielectron .
Origin of positronposi(tive) (elec)tron