5. (Mining) A small fissure which admits water to the workings. Knight.

Case, v. t. [imp. & p. p. Cased (?); p. pr. & vb. n. Casing.] 1. To cover or protect with, or as with, a case; to inclose.

The man who, cased in steel, had passed whole days and nights in the saddle.

Prescott.