leucite, n. [Gr. leyko`s white: cf. F. leucite.].
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A mineral having a glassy fracture, occurring in translucent trapezohedral crystals. It is a silicate of alumina and potash KAlSi2O6. It is found in the volcanic rocks of Italy, especially at Vesuvius. [1913 Webster]
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A leucoplast. [1913 Webster]