From The Collaborative International Dictionary of English v.0.48 [gcide]:
Polyspast \Pol"y*spast\, noun [L. polyspaston, fr. Gr. ?, fr. ? drawn by several cords; poly's many + ? to draw: cf. F. polyspaste.] (Surg.) A machine consisting of many pulleys; specifically, an apparatus formerly used for reducing luxations.
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