gabbro

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

gabbro Usage Examples

Adjective modifier

black: Stage 7 Cross Yorkshire Street to the Royal Bank of Scotland which has a plinth of polished black gabbro called Bon Accord.

Modifies a noun

rock: Above: Gabbro rock thin section, Open University slide.
slab: Scrambling over the gabbro slabs on the floor of the hanging valley, Coir ' a ' Mhadaidh.

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