Ratch

rach, n. a rack or bar with teeth into which a click drops: the wheel which makes a clock strike: a white mark on the face of a horse.— v.t. to stretch: to streak.— v.i. to sail by tacks.— ns. Ratch′et , a bar acting on the teeth of a ratchet-wheel: a click or pall; Ratch′et-coup′ling , a device for uncoupling machinery in the event of a sudden stoppage; Ratch′et-drill , a tool for drilling holes, the bit mounted in a stock and rotated by a ratchet-wheel and lever; Ratch′et-jack , a form of screw-jack; Ratch′et-lē′ver , a lever fitted round a ratchet-wheel; Ratch′et-punch , a punch worked by means of a ratchet-lever; Ratch′et-wheel , a wheel having teeth against which a ratchet abuts, for changing a reciprocating into a rotatory motion, .; Ratch′et-wrench , a ratchet bed-key wrench.— adj. Ratch′ety , jerky.— n. Ratch′ment ( arch it. ), a flying buttre springing from corner principals. [ Rack. ]