[poz-i-tron] /ˈpɒz ɪˌtrɒn/

noun, Physics.
an elementary particle having the same mass and spin as an but having a charge equal in magnitude to that of the negative charge; the antiparticle of the .
(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

1933, coined 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.
The antiparticle that corresponds to an electron. Also called antielectron.
positron [(poz-i-tron)]

The antiparticle for an electron; it has the same mass as an electron, but carries a positive charge.

Note: Positrons are found in collisions initiated by cosmic rays.


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