gabbro Hear it!

gabbro definition

gab·bro (gab′rō)

noun

any of a group of usually dark, coarsegrained, igneous rocks, composed chiefly of pyroxene and plagioclase

Etymology: It < L glaber, bare: see glabrous

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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