| euclase | <chemical> A brittle gem occurring in light green, transparent crystals, affording a brilliant clinodiagonal cleavage. It is a silicate of alumina and glucina. Origin: Gr. Well, easily + to break. Cf. F. Euclase, G. Euklas. See named from its brittleness. Source: Websters Dictionary (01 Mar 1998) |
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