/ Dictionary / Index M megagametophyte: Meaning and Definition of Find definitions for: meg•a•ga•me•to•phyte Pronunciation: (meg"u-gu-mē'tu-fīt"), [key] — n. Bot. the female gametophyte in seed plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: megagametophyte (Thesaurus) megagamete megahertz Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language