[mez-uh-krat-ik, mes-, mee-zuh-, -suh-]
- (of an igneous rock) composed of light and dark minerals in nearly equal amounts.
Origin of mesocratic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (of igneous rocks) containing 30–60 per cent of ferromagnesian minerals
C20: from meso- + -crat, with allusion to the moderately dark colour of the rock. Compare leucocratic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012