Hypertext Webster Gateway: "gabbro"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Gabbro \Gab"bro\, n. [It.] (Geol.)
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).
From WordNet (r) 1.7 (wn)
gabbro
n : one of a family of granular intrusive rocks
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