pulley

A simple machine consisting essentially of a wheel with a grooved rim in which a pulled rope or chain can run to change the direction of the pull and thereby lift a load.

A wheel turned by or driving a belt.

To raise or hoist with a pulley.

A pulley which merely tightens the belt but takes off no power.

A pulley built up of segments or sectors.

A segmental pulley; a pulley made in two or more sectors for convenience in casting.

Properly, a simple machine consisting of a wheel having a grooved rim for carrying a rope or other line, and turning in a frame, which, when movable, is termed a pulley-block.

A block containing several grooved wheels.

A tackle or apparatus consisting of one or more pulley-blocks with a rope or ropes reeved through them for use in hoisting.

In anatomy: A trochlea, or trochlear surface of an articulation.