Gabbro n. : A name originally given by the Italians to a kind of serpentine, later to the rock called euphotide, and now generally used for a coarsely crystalline, igneous rock consisting of lamellar pyroxene (diallage) and labradorite, with sometimes chrysolite (olivine gabbro).

Example:
Relationship between basalt and Gabbro points for bestanswer?

Taxonomy
Gabbro, pyroxene, plagioclase, Rock Creek Canyon, grained, eastern Sierra Nevada, free encyclopedia, rock, specimen, olivine, silica, black granite, basalt, molten magma, Petrology, mineral, intrusion, Sierra Nevada, California.

Defination from the web:
Gabbro (pronounced /ˈɡæbroʊ/) refers to a large group of dark, coarse-grained, intrusive mafic igneous rocks chemically equivalent to basalt. ... Gabbro often contains valuable amounts of chromium, nickel, cobalt, gold, silver, platinum, and copper sulfides. ...