/ Dictionary / Index E electron-neutrino: Meaning and Definition of Find definitions for: e•lec•tron-neu•tri•no Pronunciation: (i-lek'tron-n-trē"nō, -ny-), [key] — pl. -nos. a type of neutrino that obeys a conservation law together with the electron, with the total number of electrons and electron-neutrinos minus the total number of their antiparticles remaining constant. Also calledCf. lepton. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. electron multiplier electron optics Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language