noun mu·on \ˈmyü-ˌän\

Definition of muon

  1. :  an unstable lepton that is common in the cosmic radiation near the earth's surface, has a mass about 207 times the mass of the electron, and exists in negative and positive forms


play \myü-ˈä-nik\ adjective

Origin and Etymology of muon

contraction of earlier mu-meson, from mu

First Known Use: 1951

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