polyspastn.

Brit.

/ˈpɒlɪspast/, U.S.

/ˈpɑliˌspæst/

Forms:

α. 1600s–1700s 1900s– polyspaston.

β. 1600s–1700s 1900s– polyspast.

Origin: A borrowing from Latin. Etymon: Latin polyspaston.

Etymology: < classical Latin polyspaston compound pulley (Vitruvius), in post-classical Latin also an apparatus for reducing a dislocated joint (1690 in the passage translated in quot. 1693) < Hellenistic Greek πολύσπαστον compound pulley, use as noun of neuter of πολύσπαστος drawn by many cords < ancient Greek πολυ- poly- comb. form + σπᾶν to draw (see spasm n.) + -τος, suffix forming verbal adjectives. Compare French †polyspaste (1691; < classical Latin).In α. forms after the Greek and Latin forms.

Now historical.

A winch or lifting device incorporating a system of several pulleys. Also (Surgery): †an apparatus for reducing a dislocated joint (obsolete).In later use only with reference to the machine described by Vitruvius (see quot. 1960).

ΚΠ

1648 Bp. J. Wilkins Math. Magick i. xiv. 93 Therefore Vbaldus doth more properly style it Polyspaston, or an instrument of many Pulleys.

1693 tr. S. Blankaart Physical Dict. (ed. 2) 167/1 Polyspaston [L. Polyspaston], a Machine for reducing Joynts.

1724 N. Bailey Universal Etymol. Eng. Dict. (ed. 2) Polyspast, a Windless with many Pulleys or Truckles..(among Surgeons) a Machine for reducing Joints.

1960 M. H. Morgan tr. Vitruvius Ten Bks. Archit. x. 288 This kind of machine is called a polyspast, because of the many revolving sheaves to which its dexterity and despatch are due.

1974 Jrnl. Hellenic Stud. 94 12/1 Vitruvius emphasises that only experts can operate the polyspaston, worked by direct pulling without a winch.

1994 Amer. Jrnl. Archaeol. 98 792/1 The three principal lifting machines described by Vitruvius (the simple crane or trispast, a double crane with treadwheel, and the single mast with triple pulley or polyspast).

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	polyspast
释义	polyspastn. Brit. /ˈpɒlɪspast/, U.S. /ˈpɑliˌspæst/ Forms: α. 1600s–1700s 1900s– polyspaston. β. 1600s–1700s 1900s– polyspast. Origin: A borrowing from Latin. Etymon: Latin polyspaston. Etymology: < classical Latin polyspaston compound pulley (Vitruvius), in post-classical Latin also an apparatus for reducing a dislocated joint (1690 in the passage translated in quot. 1693) < Hellenistic Greek πολύσπαστον compound pulley, use as noun of neuter of πολύσπαστος drawn by many cords < ancient Greek πολυ- poly- comb. form + σπᾶν to draw (see spasm n.) + -τος, suffix forming verbal adjectives. Compare French †polyspaste (1691; < classical Latin).In α. forms after the Greek and Latin forms. Now historical. A winch or lifting device incorporating a system of several pulleys. Also (Surgery): †an apparatus for reducing a dislocated joint (obsolete).In later use only with reference to the machine described by Vitruvius (see quot. 1960). ΚΠ 1648 Bp. J. Wilkins Math. Magick i. xiv. 93 Therefore Vbaldus doth more properly style it Polyspaston, or an instrument of many Pulleys. 1693 tr. S. Blankaart Physical Dict. (ed. 2) 167/1 Polyspaston [L. Polyspaston], a Machine for reducing Joynts. 1724 N. Bailey Universal Etymol. Eng. Dict. (ed. 2) Polyspast, a Windless with many Pulleys or Truckles..(among Surgeons) a Machine for reducing Joints. 1960 M. H. Morgan tr. Vitruvius Ten Bks. Archit. x. 288 This kind of machine is called a polyspast, because of the many revolving sheaves to which its dexterity and despatch are due. 1974 Jrnl. Hellenic Stud. 94 12/1 Vitruvius emphasises that only experts can operate the polyspaston, worked by direct pulling without a winch. 1994 Amer. Jrnl. Archaeol. 98 792/1 The three principal lifting machines described by Vitruvius (the simple crane or trispast, a double crane with treadwheel, and the single mast with triple pulley or polyspast). This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < n.1648
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