A wheel turning about an axis, and carrying a rope, chain or band on its rim, used for raising weights, changing direction of pull, transmission of power, etc
A block
A combination of pulleys or blocks
A frame on which clothes are hung to dry, suspended from a ceiling by pulleys (Scot)
ORIGIN: ME poley, puly, from OFr polie, from LL polegia, supposed to be from a dimin of Gr polos axle