/ Dictionary / Index M macronucleate: Meaning and Definition of Find definitions for: mac•ro•nu•cle•ate Pronunciation: (mak"rō-n'klē-it, -āt", -ny'-), [key] — adj. having a macronucleus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. macron macronucleus Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language