/ Dictionary / Index M mefenamic acid: Meaning and Definition of Find definitions for: mef'e•nam'ic ac'id Pronunciation: (mef'u-nam'ik, mef"-), [key] — Pharm. Pharm. a white powder, CHNO, used as a mild analgesic, anti-inflammatory, and antipyretic in certain types of arthritis and for the relief of moderate short-term pain due to dysmenorrhea. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. meetly Meg Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language