muonium
noun
mu·on·ium
myü-ˈō-nē-əm 
-ˈä-
-ˈä-
: a short-lived quasi-atom consisting of an electron and a positive muon
Word History
Etymology
New Latin
First Known Use
1957, in the meaning defined above
Dictionary Entries Near muonium
Cite this Entry
“Muonium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/muonium. Accessed 19 Apr. 2024.
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Britannica.com: Encyclopedia article about muonium
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