Bible Dictionaries
Abbro

Webster's Dictionary

(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).

Bibliography Information
Webster, Noah. Entry for 'Abbro'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​a/abbro.html. 1828.