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pulley

[pool-ee]

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noun, plural -leys.

a wheel, with a grooved rim for carrying a line, that turns in a frame or block and serves to change the direction of or to transmit force, as when one end of the line is pulled to raise a weight at the other end: one of the simple machines.

a combination of such wheels in a block, or of such wheels or blocks in a tackle, to increase the force applied.

a wheel driven by or driving a belt or the like, used to deliver force to a machine, another belt, etc., at a certain speed and torque.

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Origin:
1275–1325; Middle English poley, puly < Middle French polie ≪ Medieval Greek *polídion little pivot, equivalent to pól(os) pole² + -idion diminutive suffix

Related forms

pul·ley·less, adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Pulley is always a great word to know.

So is slumgullion. Does it mean:

the offspring of a zebra and a donkey.

a stew of meat, vegetables, potatoes, etc.

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Example Sentences

Insert a nail through the last link of a chain segment and feed the other end over the pulley and into the cavity.

The cameraman has to use a pulley to pull the camera back up to the top after each dive.

To work the machines, you use a big wooden lever to slide the belt from the dummy pulley to the power pulley.

EXPAND

Insert a nail through the last link of a chain segment and feed the other end over the pulley and into the cavity.

The cameraman has to use a pulley to pull the camera back up to the top after each dive.

To work the machines, you use a big wooden lever to slide the belt from the dummy pulley to the power pulley.

Inside, a float goes up and down with the water level, moving a pulley that drives a recording device.

For the next two hours, the scientists took blood and fat samples and weighed the bears using a stretcher and pulley.

The intrepid zipliner grabs onto a couple of handles welded onto a pulley and slides down.

Tie a large knot in each cord where it emerges from the pulley hole to prevent the cord from falling into the cavity.

The prisoners are fed by means of two baskets on a pulley.

They tend to operate on pulley systems that derive tension from stacks of weights or heavy-duty rubber.

Matthias is currently on a simplified version three, which does away with the rubber-band retaining pulley of earlier versions.

They tend to operate on pulley systems that derive tension from stacks of weights or heavy-duty rubber bands.

Note the pulley and string system that moves the frequency indicator.

But that did not stop him from buying an old wooden pulley and a tool for lifting railroad ties.

And since the mechanism's chain-driven pulley jockeys generate power, battery life is measured in years.

Outside, there is a wooden beam, which was part of a pulley that hoisted hay.

Replacing the tensioner pulley should keep things in place.

To eliminate long lines of collection trucks, an automated circular interior ramp with a pulley system could tow waiting.

If the window has a pulley system, remove all paint from the ropes to help them slide easily.

Actually, he was raised and lowered by an all-too-visible wire and pulley.

It features a pulley system that raises and lowers a basket that can be filled with food, wine or other supplies.

Winches and pulley systems became ever more elaborate.

Danish artisans hoisted sets with intricate string and pulley mechanisms.

By jacking up the rear and replacing one wheel with a pulley and leather drive.

Mitchell rigged a pulley system to move photographic paper through a vat of chemicals.

COLLAPSE

Collins

World English Dictionary

pulley (ˈpʊlɪ)

—n
1.	a wheel with a grooved rim in which a rope, chain, or belt can run in order to change the direction or point of application of a force applied to the rope, etc
2.	a number of such wheels pivoted in parallel in a block, used to raise heavy loads
3.	a wheel with a flat, convex, or grooved rim mounted on a shaft and driven by or driving a belt passing around it

[C14 poley, from Old French polie, from Vulgar Latin polidium (unattested), apparently from Late Greek polidion (unattested) a little pole, from Greek polos axis]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

pulley

1324, from O.Fr. polie (c.1150), from M.L. poliva, from Medieval Gk. *polidia, pl. of *polidion "little pivot," dim. of Gk. polos "pivot, axis" (see pole (2)).

American Heritage

Science Dictionary

pulley (p

l'ē) Pronunciation Key
A machine consisting of a wheel over which a pulled rope or chain runs to change the direction of the pull used for lifting a load. Combinations of two or more pulleys working together reduce the force needed to lift a load. See also block and tackle.

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"I have thought of a pulley to raise me gradually; but that would give me pain, as it would counteract my natural inclination. I would have something that can dissipate the vis inertiae and give elasticity to the muscles.... We can heat the body, we can cool it; we can give it tension or relaxation; and surely it is possible to bring it into a state in which rising from bed will not be a pain."

-Samuel Johnson

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