pulley block is a noun meaning "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". It carries one recorded sense.
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
Definitions, synonyms and semantic relations for pulley block come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.