bucking

n. 1. The act or process of soaking or boiling cloth in an alkaline liquid in the operation of bleaching; also, the liquid used. Tomlinson. [ 1913 Webster ]

2. A washing. [ 1913 Webster ]

3. The process of breaking up or pulverizing ores. [ 1913 Webster ]

Bucking iron (Mining), a broad-faced hammer, used in bucking or breaking up ores. --
Bucking kier (Manuf.), a large circular boiler, or kier, used in bleaching. --
Bucking stool, a washing block. [ 1913 Webster ]