/ Dictionary / Index P polyprotic: Meaning and Definition of Find definitions for: pol•y•prot•ic Pronunciation: (pol"ē-prot'ik), [key] — adj. Chem. (of an acid) having two or more transferable protons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polypropylene polyptych Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language