/ Dictionary / Index M mottramite: Meaning and Definition of Find definitions for: mot•tram•ite Pronunciation: (mo'tru-mīt"), [key] — n. Mineral. a copper and lead vanadate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. motto motu proprio* Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language