/ Dictionary / Index P ptyalin: Meaning and Definition of Find definitions for: pty•a•lin Pronunciation: (tī'u-lin), [key] — n. Biochem. an enzyme in the saliva that converts starch into dextrin and maltose. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ptyalin (Thesaurus) ptyalectasis ptyalism Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language