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Definition of sprocket noun from the Oxford Advanced Learner's Dictionary

sprocket

noun
 
/ˈsprɒkɪt/
 
/ˈsprɑːkɪt/
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  1. (also sprocket wheel)
     a wheel with a row of teeth around the edge that connect with the holes of a bicycle chain or with holes in a film, etc. in order to turn itTopics Engineeringc2
  2. one of the teeth on such a wheelTopics Engineeringc2
    3. Word Originmid 16th cent. (denoting a triangular piece of timber used in a roof): of unknown origin.
See sprocket in the Oxford Advanced American Dictionary
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