muonium

M3U1O1N1I1U1M3

noun

An exotic atom formed when a positively charged muon (an anti-muon) and an electron are bound by their mutual electrical attraction; chemically equivalent to a light, short-lived isotope of hydrogen.

Similar
element 0element zerohydrogen-0Mu
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Meanings

nounmuonium (plural muoniums)

plural muoniums

  1. chemistryAn exotic atom formed when a positively charged muon (an anti-muon) and an electron are bound by their mutual electrical attraction; chemically equivalent to a light, short-lived isotope of hydrogen.

    Synonyms: element 0, element zero, hydrogen-0, Mu

Synonyms & antonyms

nounAn exotic atom formed when a positively charged muon (an anti-muon) and an electron are bound by their mutual electrical attraction; chemically equivalent to a light, short-lived isotope of hydrogen.

Similar
element 0element zerohydrogen-0Mu
Also see
element zerohydrogen-0

Origin

From muon + -ium.

Full word history & related roots →
Cite this entry
APA

muonium. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/muonium

MLA

“muonium.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/muonium. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “muonium,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/muonium.

Source: muonium on Wiktionary, CC BY-SA 4.0.