joft-e elektron-pozitron (#)
Fr.: paire électron-positron
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.
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.