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mafic

 - 2 dictionary results

maf⋅ic

  [maf-ik]
Use mafic in a Sentence
–adjective Geology.
of or pertaining to rocks rich in dark, ferromagnesian minerals. Compare basic (def. 4), ultramafic.
Origin:
1910–15; ma(gnesium) + L f(errum) iron + -ic
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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maf·ic   (māf'ĭk)   
adj.  Containing or relating to a group of dark-colored minerals, composed chiefly of magnesium and iron, that occur in igneous rocks.

[ma(gnesium) + Latin f(errum), iron + -ic.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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