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mafic

[maf-ik] /ˈmæf ɪk/
adjective, Geology
1.
of or relating to rocks rich in dark, ferromagnesian minerals.
Compare basic (def 4), ultramafic.
Origin of mafic
1910-1915
1910-15; ma(gnesium) + Latin f(errum) iron + -ic
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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mafic in Science
mafic
  (māf'ĭk)   
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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