sprocket /ˈsprɑːkət/ noun plural sprockets
plural sprockets
Learner's definition of SPROCKET
[count]
: a wheel that has a row of teeth around its edge which fit into the holes of something (such as a bicycle chain or a piece of film) and cause it to turn when the wheel turns
also : any one of the teeth on such a wheel链齿;链轮;输片齿轮