mafic

[ maf-ik ]
/ ˈmæf ɪk /

adjective Geology.

of or relating to rocks rich in dark, ferromagnesian minerals.Compare basic (def. 4), ultramafic.

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Origin of mafic

1910–15; ma(gnesium) + Latin f(errum) iron + -ic

Words nearby mafic

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Scientific definitions for mafic

mafic
[ măfĭk ]

Relating to an igneous rock that contains a group of dark-colored minerals, composed chiefly of magnesium and iron. Compare felsic.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.