/ Dictionary / Index M myrtaceous: Meaning and Definition of Find definitions for: myr•ta•ceous Pronunciation: (mûr-tā'shus), [key] — adj. belonging to the Myrtaceae, the myrtle family of plants. Cf. of, pertaining to, or resembling the myrtle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Myrrha myrtle Related Content Daily Word Quiz: meritocracy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language