Euclase

1 definition found

From The Collaborative International Dictionary of English v.0.48 [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]