Leu″cite (lū″sīt), n. [Gr. λευκόσ 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.