/ Dictionary / Index M muon-neutrino: Meaning and Definition of Find definitions for: mu•on-neu•tri•no Pronunciation: (my'on-n-trē"nō, -ny-), [key] — pl. -nos. 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 calledCf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. muonium M.U.P. Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language