gabbro Meaning, Definition & Usage
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noun one of a family of granular intrusive rocks
WordNet
Gab"bro noun
Etymology
It.Definitions
(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).