ratchet wheel

Noun
  1. Toothed wheel held in place by a pawl or detent and turned by a lever (synset 104062559)
    is a type of: wheel - a simple machine consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle (as in vehicles or other machines)
    is a part of: rachet, ratch, ratchet - mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction

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