What is "polishing wheel"

Polishing \Pol"ish*ing\, a. & n. from Polish. Polishing iron, an iron burnisher; esp., a small smoothing iron used in laundries. Polishing slate.

1. A gray or yellow slate, found in Bohemia and Auvergne, and used for polishing glass, marble, and metals.

2. A kind of hone or whetstone; hone slate.

   Polishing snake, a tool used in cleaning lithographic stones.

   Polishing wheel, a wheel or disk coated with, or composed of, abrading material, for polishing a surface.