/ Dictionary / Index D dextranase: Meaning and Definition of Find definitions for: dex•tran•ase Pronunciation: (dek'stru-nās", -nāz"), [key] — n. Biochem. an enzyme that hydrolyzes dextran to smaller oligosaccharides: used in dentifrices to dissolve dental plaque. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dextran dextrin 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