/ Dictionary / Index P polyphenol: Meaning and Definition of Find definitions for: pol•y•phe•nol Pronunciation: (pol"ē-fē'nôl, -nol), [key] — n. Chem. a polymeric phenol. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Polyphemus moth polyphone Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language