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sanidine |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Sanidine \San"i*dine\, n. [Gr. ?. ?, a board. So called in allusion to the tabular crystals.] (Min.) A variety of orthoclase feldspar common in certain eruptive rocks, as trachyte; -- called also {glassy feldspar}.