An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

The simultaneous formation of an → electron and a → positron in the → pair production process.

→ electron; → positron; → pair.

The → antiparticle of the → electron, which has the same → mass, → spin, and → electric charge as the electron, but the charge is → positive. Positrons may be generated by → radioactive decay or by → pair production from energetic → gamma ray photons.

From posi(tive), → positive + (elec)tron→ electron.

A short-lived bound state of a positron and an electron.

From → positron + -ium (as in barium, titanium), from N.L., from L. neuter suffix.