/ Dictionary / Index M megadontia: Meaning and Definition of Find definitions for: meg•a•don•tia Pronunciation: (meg"u-don'shu, -shē-u), [key] — n. macrodontia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. megadont megadose Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language