'Zoisite' definitions:

Definition of 'Zoisite'

From: GCIDE

Zoisite \Zois"ite\, n. [After its discoverer, Von Zois, an Austrian mineralogist.] (Min.) A grayish or whitish mineral occurring in orthorhombic, prismatic crystals, also in columnar masses. It is a silicate of alumina and lime, and is allied to epidote. [1913 Webster]