/ Dictionary / Index M methylacetic acid: Meaning and Definition of Find definitions for: meth'yl•a•ce'tic ac'id Pronunciation: (meth'ul-u-sē'tik, -u-set'ik), [key] — Chem. Chem. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. methyl acetate methylal Related Content Daily Word Quiz: diurnal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language