Definitions from Wiktionary (protonium)
▸ noun: (physics) An exotic atom consisting of a proton bound to an antiproton.
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▸ noun: (physics) An exotic atom consisting of a proton bound to an antiproton.
Similar:
positronium,
antiproton,
proton,
protron,
pionium,
positron,
quasiproton,
photoproton,
antiprotonic helium,
antiatom,
more...
Opposite:
▸ Words similar to protonium
▸ Usage examples for protonium
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▸ Wikipedia articles (New!)
▸ Popular adjectives describing protonium
▸ Words that often appear near protonium
▸ Rhymes of protonium
▸ Invented words related to protonium