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dolerite

[dol-uh-rahyt] /ˈdɒl əˌraɪt/
noun, Petrology
1.
a coarse-grained variety of basalt.
2.
any of various other igneous rocks, as diabase.
3.
any basaltlike igneous rock whose composition can be determined only by microscopic examination.
Origin
1830-1840
1830-40; < French dolérite < Greek doler(ós) deceitful (derivative of dólos wile) + French -ite -ite1
Related forms
doleritic
[dol-uh-rit-ik] /ˌdɒl əˈrɪt ɪk/ (Show IPA),
adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for dole rite

dolerite

/ˈdɒləˌraɪt/
noun
1.
a dark basic intrusive igneous rock consisting of plagioclase feldspar and a pyroxene, such as augite; often emplaced in dykes
2.
any dark igneous rock whose composition cannot be determined with the naked eye
Derived Forms
doleritic (ˌdɒləˈrɪtɪk) adjective
Word Origin
C19: from French dolérite, from Greek doleros deceitful; so called because of the difficulty of determining its composition
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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dole rite in Science
dolerite
  (dŏl'ə-rīt')   
See diabase.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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