'Euclase' definitions:

Definition of 'Euclase'

From: GCIDE

Euclase \Eu"clase\n. [Gr. e'y^ well, easily + ? to break. Cf. F. euclase, G. euklas. See named from its brittleness.] (Min.) A brittle gem occurring in light green, transparent crystals, affording a brilliant clinodiagonal cleavage. It is a silicate of alumina and glucina. [1913 Webster]