positronium

[ poz-i-troh-nee-uhm ]

nounPhysics.
  1. a short-lived atomic system consisting of a positron and an electron bound together.

Origin of positronium

1
First recorded in 1945; positron + -ium; coined by Arthur E. Ruark (1899–1979), U.S. physicist

Words Nearby positronium

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British Dictionary definitions for positronium

positronium

/ (ˌpɒzɪˈtrəʊnɪəm) /


noun
  1. physics a short-lived entity consisting of a positron and an electron bound together. It decays by annihilation to produce two or three photons

Origin of positronium

1
C20: from positron + -ium

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