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DIORITIC

 - 2 dictionary results

di⋅o⋅rite

  [dahy-uh-rahyt]
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–noun
a granular igneous rock consisting essentially of plagioclase feldspar and hornblende.
Origin:
1820–30; < F < Gk dior(ízein) to distinguish (see di- 3 , horizon ) + F -ite -ite 1

Related forms:
di⋅o⋅rit⋅ic  [dahy-uh-rit-ik] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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di·o·rite   (dī'ə-rīt')   
n.  Any of various dark, granite-textured, crystalline rocks rich in plagioclase and having little quartz.

[French, from Greek diorizein, to distinguish : dia-, apart, between; see dia- + horizein, to divide, limit; see horizon.]
di'o·rit'ic (-rĭt'ĭk) adj.
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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