/myooh"on nooh tree'noh, -nyooh-/ , n. , pl. muon-neutrinos . Physics.
a type of neutrino that obeys a conservation law together with the muon, with the total number of muons and muon-neutrinos minus the total number of their antiparticles remaining constant. Also called mu-neutrino, muonic neutrino . Cf. lepton .