English to English

noun (n)

• a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward(noun.artifact)

  Synonym:
  click, dog, pawl
  

  source: wordnet30
• That which locks or unlocks a movement; a catch, pawl, or dog; especially, in clockwork, the catch which locks and unlocks the wheelwork in striking.(noun)

  source: webster1913