/ Dictionary / Index A acetylformic acid: Meaning and Definition of Find definitions for: a•ce'tyl•for'mic ac'id Pronunciation: (u-sēt'l-fôr'mik, u-set'-, as'i-tl-&wdspcu-sēt&secl-fôr'mik, u-set&sec-, as&seci-tl-), [key] — Chem. Chem. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acetylene series acetyl group Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language