Positron

[Oralee]

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.

[PussyCat]

A subatomic particle with the same mass as an electron and a numerically equal but positive charge.