n. 1 each of several teeth on a wheel engaging with links of a chain, e.g. on a bicycle, or with holes in film or tape or paper. 2 (also sprocket-wheel) a wheel with sprockets.
[ 16th c.: orig. unkn. ]
SPROCKET
Meaning of SPROCKET in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012