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trachyte |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Trachyte \Tra"chyte\, n. [Gr. ? rough, rugged: cg F. trachyte.] (Geol.) An igneous rock, usually light gray in color and breaking with a rough surface. It consists chiefly of orthoclase feldspar with sometimes hornblende and mica.
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