What does "muonium" mean?

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.

What is a synonym for "muonium"?

Common synonyms include: element 0, element zero, hydrogen-0, mu.

Muonium

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
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.

Synonyms

All synonyms

element 0 element zero hydrogen-0 mu

Etymology

From muon + -ium.

Related phrases

true muonium anti muon exotic atom

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.