/ Dictionary / Index D diastase: Meaning and Definition of Find definitions for: di•a•stase Pronunciation: (dī'u-stās", -stāz"), [key] an enzyme that breaks down starch into maltose, then dextrose, and is present in malt. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diaspore diastasis Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language