[from the Anglo-Saxon wince]. A purchase formed by a shaft whose extremities rest in two channels placed horizontally or perpendicularly, and furnished with cranks, or clicks, and pauls. It is employed as a purchase by which a rope or tackle-fall may be more powerfully applied than when used singly. A small one with a fly-wheel is used for making ropes and spun-yarn. Also, a support to the windlass ends. Also, the name of long iron handles by which the chain-pumps are worked. Also, a small cylindrical machine attached to masts or bitts in vessels, for the purpose of hoisting anything out of the hold, warping, &c.