Rūsk, n.

n. [Probably from L. Ger. rusken, to creak, crackle. See RUSH, v., supra.]

1. A kind of light, soft cake, or a kind of soft, sweetened biscuit.
2. A kind of cake or small loaf which has been rasped. Simmonds.
3. A kind of light, hard cake or bread, as for stores. Smart.