• synonyms


[ 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.

Nearby words

dole, bob, dole, sanford ballard, doleful, dolefully, dolente, dolerite, doleritic, dolesome, dolgellau, dolicho-, dolichocephalic

Origin of dolerite

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