Толковый словарь английского языка - pulley
Pulley
pulley
noun (plural ~s) see: pole Date: 14th century a sheave or small wheel with a grooved rim and with or without the block in which it runs used singly with a rope or chain to change the direction and point of application of a pulling force and in various combinations to increase the applied force especially for lifting weights, a ~ or ~s with ropes to form a tackle that constitutes one of the simple machines, a wheel used to transmit power by means of a band, belt, cord, rope, or chain passing over its rim
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1.
n. & v. --n. (pl. -eys) 1 a grooved wheel or set of wheels for a cord etc. to pass over, set in a block and used for changing the direction of a force. 2 a wheel or drum fixed on a shaft and turned by a belt, used esp. to increase speed or power. --v.tr. (-eys, -eyed) 1 hoist or work with a pulley. 2 provide with a pulley. Etymology: ME f. OF polie prob. ult. f. med. Gk polidion (unrecorded) pivot, dimin. of polos POLE(2) ...Толковый словарь английского языка Oxford English Reference
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