Rusk (?), n. [Sp. rosca de mar sea rusks, a kind of biscuit, rosca properly meaning, a screw, spiral.] 1. A kind of light, soft bread made with yeast and eggs, often toasted or crisped in an oven; or, a kind of sweetened biscuit.
2. A kind of light, hard cake or bread, as for stores. Smart.
3. Bread or cake which has been made brown and crisp, and afterwards grated, or pulverized in a mortar.