An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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positronium
  پوزیترونیوم  
pozitroniom
Fr.: positronium  

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

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