/ Dictionary / Index H heteroplasia: Meaning and Definition of Find definitions for: het•er•o•pla•sia Pronunciation: (het"ur-u-plā'zhu, -zhē-u, -zē-u), [key] — n. Pathol. the replacement of normal cells by abnormal cells, as in cancer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heterophyte heteroplasty Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language