/ Dictionary / Index E ethyl malonate: Meaning and Definition of Find definitions for: eth'yl mal'onate Pronunciation: [key] — Chem. Chem. a colorless, water-insoluble liquid, CHO, having a pleasant, aromatic odor: used chiefly as an intermediate in the synthesis of barbiturates. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ethylic ethyl mercaptan Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language