antihydrogen

Meanings

1. 1
   noun

   the antimatter counterpart of hydrogen, whose atom consists of a positron bound to an antiproton

   Researchers trapped antihydrogen long enough to compare its spectrum with that of ordinary hydrogen.

Formed from anti- ("antimatter counterpart") + hydrogen. The name identifies the simplest antiatom: a positron occupying the role of the electron around an antiproton.

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