n. (Physics) 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. Syn. -- muon, negative muon. [ WordNet 1.5 ]
(n) an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino, Syn.negative muon, mu-meson
