gabbro
a dark granular igneous rock composed essentially of labradorite and augite.
Origin of gabbro
1Other words from gabbro
- gab·bro·ic [guh-broh-ik], /gəˈbroʊ ɪk/, gab·bro·it·ic, adjective
- gab·broid [gab-roid], /ˈgæb rɔɪd/, adjective
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British Dictionary definitions for gabbro
/ (ˈɡæbrəʊ) /
a dark coarse-grained basic plutonic igneous rock consisting of plagioclase feldspar, pyroxene, and often olivine
Origin of gabbro
1Derived forms of gabbro
- gabbroic or gabbroitic, adjective
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
Scientific definitions for gabbro
[ găb′rō ]
A usually dark, coarse-grained igneous rock composed mostly of plagioclase feldspar and clinopyroxene, and sometimes olivine. Gabbro is the coarse-grained equivalent of basalt.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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