/ Dictionary / Index M matripotestal: Meaning and Definition of Find definitions for: mat•ri•po•tes•tal Pronunciation: (ma"trē-pō-tes'tl, mā"-), [key] — adj. Anthropol. of or pertaining to the authority exercised by a mother or a mother's blood relatives. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. matrimony vine matrix 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