|physics the antiparticle of the electron, having the same mass but an equal and opposite charge. It is produced in certain decay processes and in pair production, annihilation occurring when it collides with an electron|
|[C20: from posi(tive + elec)tron]|
positron pos·i·tron (pŏz'ĭ-trŏn')
A positively charged particle of the same mass and magnititude of charge as an electron. Also called antielectron, positive electron.
|positron (pŏz'ĭ-trŏn') Pronunciation Key
The antiparticle that corresponds to an electron. Also called antielectron.