The Collaborative International Dictionary
Jigging machine
Jigging \Jig"ging\, n. (Mining) 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. Jigging machine.
(Mining) A machine for separating ore by the process of jigging.
(Metal Working) 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.