leu·cite /ˈluˌsaɪt/
  白榴石
  Leu·cite n.
  1. Min. 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.
  2. Bot. A leucoplast.
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