/ Dictionary / Index M myocardial infarction: Meaning and Definition of Find definitions for: myocar'dial infarc'tion Pronunciation: [key] SeeAbbr.: MI Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. myoblast myocardiogram Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language