Top Definition
An elementary particle similar to an electron, except that it has a positive charge instead of a negative charge. It is an antiparticle, which is a particle that forms antimatter.
When a positron comes into contact with an electron, they annihilate each other, releasing energy.
Look, I got a jar of positrons! I think I'll open it.

No, you fool!!

av bob882 6 juli 2004
Being completely sure. Positive.
Did you hide the bong?

Yea dude, in the garage.

Are you absolutely Positron?
av Sir.neilium 4 februari 2008
The antimatter equivalent of an electron. It has the same mass as an electron, but opposite charge (positive). Both electrons and positrons are created by photons through a process called pair production. Positrons are sometimes called "antielectrons".
When a positron and electron orbit one another, they make positronium before annihilating shortly after. A positronium atom can bond with hydrogen to make positronium hydride, or with another positronium atom to make di-positronium.
av Pie Stealer 27 oktober 2015

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