muon
noun
1.
an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino
Origin
Contraction of the earlier term mu-meson; the particle has now been recategorised as a lepton. Coined by Italian physicist Enrico Fermi in 1951 in his book Elementary Particles.
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Broader terms
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