- a hypothetical type of neutrino that would obey a conservation law together with the tau lepton, with the total number of tau leptons and tau neutrinos minus the total number of their antiparticles remaining constant.
Also called tau·on·ic neutri·no [taw-on-ik, tou-] /tɔˈɒn ɪk, taʊ-/.
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- physics a type of neutrino associated with tau particles
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