/ Dictionary / Index M mesocratic: Meaning and Definition of Find definitions for: mes•o•crat•ic Pronunciation: (mez"u-krat'ik, mes"-, mē"zu-, -su-), [key] — adj. Petrol. (of an igneous rock) composed of light and dark minerals in nearly equal amounts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mesocranic mesocyclone Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language