n. Scaly or flaky matter on the surface of the skin; the scarf-skin or epidermis exfoliated in fine shreds or scales.n. Any scaly or flaky matter on a surface.n. Specificallyn. In botany, a loose bran-like scaly matter that is found on some leaves, as in the genus Elæagnus, etc.n. A growth of polyps on oysters.n. Scum; offscouring.n. A gray bulltrout; a variety of the trout, Salmo trutta cambricus.n. A fungous disease of potatoes, due to Rhizoctonia Solani, which gives the tubers a scurfy appearance and is accompanied by decay.