a screw jack rotated by a ratchet mechanism.
[rach-it] /ˈrætʃ ɪt/ noun 1. a toothed bar with which a pawl engages. 2. (not in technical use) a pawl or the like used with a ratchet or . 3. a mechanism consisting of such a bar or wheel with the pawl. 4. . 5. a steady progression up or down: the upward ratchet of […]
noun Apersonwho is constantly talking; motor-mouth [1970s+; perhaps because a ratchet wrench can be operated without pause and makes a constant rapid rasping, clacking noise]
noun 1. a wheel, with teeth on the edge, into which a pawl drops or catches, as to prevent reversal of motion or convert reciprocating motion into rotatory motion.
noun, Furniture. 1. an elongated foot having the form of a thin claw grasping a ball.