'Crusta' definitions:

Definition of 'Crusta'

From: GCIDE

Crusta \Crus"ta\ (kr?s"t?), n. [L., shell, crust, inlaid work.] [1913 Webster]
1. A crust or shell. [1913 Webster]
2. A gem engraved, or a plate embossed in low relief, for inlaying a vase or other object. [1913 Webster]