/ Dictionary / Index P polyacrylic acid: Meaning and Definition of Find definitions for: pol'y•a•cryl'ic ac'id Pronunciation: (pol'ē-u-kril'ik, pol"-), [key] — Chem. Chem. a polymer of acrylic acid used as a sizing agent in the manufacture of nylon and other synthetic textiles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polyacrylamide polyacrylonitrile Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language