polyvinyl formal: Meaning and Definition of

pol'yvi'nyl for'mal

Pronunciation: (fôr'mal), [key]
— Chem. Chem.
  1. a colorless, water-insoluble, polyvinyl acetal produced from partially hydrolyzed polyvinyl acetate and formaldehyde, used chiefly in the manufacture of lacquers.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.