01 n. an elementary particle with a negative charge and a half-life of 2 microseconds; the muon. It is a lepton, not a true meson, and decays toβ¦
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an elementary particle with a negative charge and a half-life of 2 microseconds; the muon. It is a lepton, not a true meson, and decays to an electron and neutrino and antineutrino.(Physics)