positron

Meanings

1. 1
   noun

   an elementary particle with positive charge

   Interaction of a positron and an electron results in annihilation.

2. 2
   noun

   The antimatter equivalent of an electron, having the same mass but a positive charge.

   The notion of a positron weapon remains the stuff of science fiction.

From positive + -tron (electron). Coined by American physicist Carl Anderson in 1932 to replace the earlier term antielectron.

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