'negative muon' definitions:

Definition of 'negative muon'

(from WordNet)
noun
An elementary particle with a negative charge and a half- life of 2 microsecond; decays to electron and neutrino and antineutrino [syn: muon, negative muon, mu-meson]

Definition of 'negative muon'

From: GCIDE
  • lepton \lepton\ n. (Physics) an elementary particle that participates in weak interactions but does not participate in the strong interaction; it has a baryon number of 0. Some known leptons are the electron, the negative muon, the tau-minus particle, and the neutrinos associated with each of these particles. [WordNet 1.5 +PJC]