/ Dictionary / Index M methacrylic acid: Meaning and Definition of Find definitions for: meth'a•cryl'ic ac'id Pronunciation: (meth'u-kril'ik, meth"-), [key] — Chem. Chem. a colorless, liquid acid, CHO, produced synthetically, whose methyl ester, methyl methacrylate, polymerizes to yield a clear plastic. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. methacrylate resin methadone Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language