Gabbro
Pronunciation : Gab"bro
Part of Speech : n.
Etymology : [It.] (Geol.)
Definition : Defn: 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).
Source : Webster's Unabridged Dictionary, 1913