/ Dictionary / Index P polyvinyl chloride: Meaning and Definition of Find definitions for: pol'yvi'nyl chlo'ride Pronunciation: [key] — Chem. Chem. a white, water-insoluble, thermoplastic resin, derived by the polymerization of vinyl chloride: used chiefly for thin coatings, insulation, and pipings. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polyvinyl butyral polyvinyl formal 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