jigging

The sifting, dressing, or sorting of ore by means of a jigging-machine.

The act or using a jig; the act of separating ore with a jigger, or wire-bottomed sieve, which is moved up and down in water.

A machine with a rotary milling cutter and a template by which the action of the cutter is guided or limited; — used for forming the profile of an irregularly shaped piece; a profiling machine.

Present participle of jig.