Breadcrumb Home > Dictionary > Index M milliequivalent: Meaning and Definition of Find definitions for: mil•li•e•quiv•a•lent Pronunciation: (mil'ē-i-kwiv'u-lunt), [key] — n. a unit of measure, applied to electrolytes, that expresses the combining power of a substance. Abbr.: mEq Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: milliequivalent (Thesaurus) millieme millier ✖ Related Content Daily Word Quiz: quadrumanous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language