pulley-block

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
• Syn:
pulley, pulley block, block
• Hypernyms:
machine, simple machine
• Hyponyms:
bollock, bullock block, fairlead, idle pulley, idler pulley, idle wheel
• Part Holonyms:
block and tackle