Ōr'tho-clāse, n.
n. [Gr. ὀρθός, straight, and κλάσις, breaking, fracture, from κλάω, to break.] (Min.) Common feldspar, including the sub-translucent varieties. Dana.
n. [Gr. ὀρθός, straight, and κλάσις, breaking, fracture, from κλάω, to break.] (Min.) Common feldspar, including the sub-translucent varieties. Dana.