/ Dictionary / Index M metaplasia: Meaning and Definition of Find definitions for: met•a•pla•sia Pronunciation: (met"u-plā'zhu, -zhē-u), [key] — n. Pathol. the transformation of one type of tissue into another. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. metaphyte metaplasm Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language