/ Dictionary / Index P polyvinyl: Meaning and Definition of Find definitions for: pol•y•vi•nyl Pronunciation: (pol"ē-vīn'l), [key] — adj. Chem. pertaining to or derived from a vinyl polymer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polyvalent polyvinyl acetal Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language