gabbro

[ gab-roh ]
/ ˈgæb roʊ /

noun, plural gab·bros. Petrology.

a dark granular igneous rock composed essentially of labradorite and augite.

Origin of gabbro

< Italian; akin to Latin glaber smooth

Related forms

gab·bro·ic [guh-broh-ik] /gəˈbroʊ ɪk/, gab·bro·it·ic, adjectivegab·broid [gab-roid] /ˈgæb rɔɪd/, adjective
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British Dictionary definitions for gabbro

gabbro

/ (ˈɡæbrəʊ) /

noun plural -bros

a dark coarse-grained basic plutonic igneous rock consisting of plagioclase feldspar, pyroxene, and often olivine

Derived Forms

gabbroic or gabbroitic, adjective

Word Origin for gabbro

C19: from Italian, probably from Latin glaber smooth, bald
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 gabbro

gabbro

[ găbrō ]

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.
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