ratch

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 directionrachet, ratchetmechanical device - mechanism consisting of a device that works on mechanical principlesdetent, pawl, click, dog - a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backwardratchet wheel - toothed wheel held in place by a pawl or detent and turned by a leverratchet 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