mafic Hear it!

mafic definition

mafic (maf′ik)

adjective

Geol. of or pertaining to igneous rocks that are rich in dark-colored minerals and that contain magnesium and iron and a comparatively low level of silica

Etymology: ma(gnesium) + L f(errum), iron + -ic

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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