positron

pos·i·tron   (pŏz'ĭ-trŏn')    n.  An elementary particle having the same mass and magnitude of charge as an electron but exhibiting a positive charge; a positive electron. Also called antielectron. [posi(tive) + (elec)tron.]

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.

positron 

Main Entry: pos·i·tron
Pronunciation: 'päz-&-"trän
Function: noun
: a positively charged particle having the same mass andmagnitude of charge as the electron and constituting the antiparticle of the electron called also positive electron

positron pos·i·tron (pŏz'ĭ-trŏn')
n.
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.