mesocratic

[ mez-uh-krat-ik, mes-, mee-zuh-, -suh- ]

adjective

, Petrology.

1. (of an igneous rock) composed of light and dark minerals in nearly equal amounts.

mesocratic

/ ˌmɛsəˈkrætɪk /

adjective

1. (of igneous rocks) containing 30–60 per cent of ferromagnesian minerals

Word History and Origins

Origin of mesocratic¹

First recorded in 1855–60; meso- + -crat + -ic

Word History and Origins

Origin of mesocratic¹

C20: from meso- + -crat , with allusion to the moderately dark colour of the rock. Compare leucocratic