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tetradymite |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Tetradymite \Tet*rad"y*mite\, n. [Gr. tetra`dymos fourfold. So named from its occurrence in compound twin crystals, or fourlings.] (Min.) A telluride of bismuth. It is of a pale steel-gray color and metallic luster, and usually occurs in foliated masses. Called also {telluric bismuth}.