RUSK
Source: 566, 567
rusk. Rusk, n. a kind of biscuit, a kind of hard bread
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Rusk (?), n. [[Sp. rosca de mar sea rusks, a kind of biscuit, rosca properly meaning, a screw, spiral.]] 1. 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. 2. A kind of light, hard cake or bread, as for stores. Smart.
3. 3. Bread or cake which has been made brown and crisp, and afterwards grated, or pulverized in a mortar.