/ Dictionary / Index P polycarbonate: Meaning and Definition of Find definitions for: pol•y•car•bon•ate Pronunciation: (pol"ē-kär'bu-nāt", -nit), [key] — n. Chem. a synthetic thermoplastic resin, a linear polymer of carbonic acid, used for molded products, films, and nonbreakable windows. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polybutylene Polycarp 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