Antihydrogen
the antimatter counterpart to hydrogen.
noun
hydrogen in which the nucleus is an antiproton with an orbiting positron
antihydrogen
(ān’tē-hī’drə-jən, ān’tī-)
The antimatter that corresponds to hydrogen. Antihydrogen has been useful in studies of the relationship between matter and antimatter, because its matter equivalent (hydrogen) is one of the most studied and most well understood forms of matter.
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