Ratch

(răch)

n.	1.	(Zool.) Same as Rotche.
	1.	A ratchet wheel, or notched bar, with which a pawl or click works.

Thesaurus

Noun

1.

ratch - mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction rachet, ratchet mechanical device - mechanism consisting of a device that works on mechanical principles detent, pawl, click, dog - a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward ratchet wheel - toothed wheel held in place by a pawl or detent and turned by a lever ratchet screwdriver, spiral ratchet screwdriver - a screwdriver with a ratchet (so the blade turns in only one direction) and a spiral in the handle (so the blade rotates) with downward pressure on the handle