muonium

noun
mu·​on·​ium | \ myü-ˈō-nē-əm How to pronounce muonium (audio) , -ˈä- How to pronounce muonium (audio) \

Definition of muonium

: a short-lived quasi-atom consisting of an electron and a positive muon

First Known Use of muonium

1957, in the meaning defined above

History and Etymology for muonium

New Latin

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The first known use of muonium was in 1957

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Cite this Entry

“Muonium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/muonium. Accessed 20 Oct. 2020.

More from Merriam-Webster on muonium

Britannica.com: Encyclopedia article about muonium

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