/ Dictionary / Index M millicurie: Meaning and Definition of Find definitions for: mil•li•cur•ie Pronunciation: (mil'i-kyoor"ē, -kyoo-rē"), [key] — n. Physics, Chem. a unit of radioactivity equal to one thousandth of a curie; 3.70 × 10 disintegrations per second. Abbr.: mCi, mc Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: millicurie (Thesaurus) Millicent millidegree Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language