/ Dictionary / Index E endoenzyme: Meaning and Definition of Find definitions for: en•do•en•zyme Pronunciation: (en"dō-en'zīm), [key] — n. Biochem. an enzyme that functions within a cell. Cf. exoenzyme. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. endodontium endoergic Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language