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Meaning of mesocratic

mes•o•crat•ic

Pronunciation: (mez"u-krat'ik, mes"-, mē"zu-, -su-), [key]
— adj. Petrol.
  1. (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.