mafic
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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