[ dol-uh-rahyt ]
/ ˈdɒl əˌraɪt /

noun Petrology.

a coarse-grained variety of basalt.
any of various other igneous rocks, as diabase.
any basaltlike igneous rock whose composition can be determined only by microscopic examination.

Origin of dolerite

1830–40; < French dolérite < Greek doler(ós) deceitful (derivative of dólos wile) + French -ite -ite1


dol·er·it·ic [dol-uh-rit-ik] /ˌdɒl əˈrɪt ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for dolerite

British Dictionary definitions for dolerite

/ (ˈdɒləˌraɪt) /


a dark basic intrusive igneous rock consisting of plagioclase feldspar and a pyroxene, such as augite; often emplaced in dykes
any dark igneous rock whose composition cannot be determined with the naked eye

Derived forms of dolerite

doleritic (ˌdɒləˈrɪtɪk), adjective

Word Origin for dolerite

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

Science definitions for dolerite

[ dŏlə-rīt′ ]

See diabase.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.