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(l"st), n.[Gr. leyko°s white: cf. F. leucite.] 1. (Min.) A mineral having a glassy fracture, occurring in translucent trapezohedral crystals. It is a silicate of alumina and potash. It is found in the volcanic rocks of Italy, especially at Vesuvius. 2. (Bot.) A leucoplast. スポンサード リンク
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