Sprocket

n.

1.

(Mach.) A tooth or projection, as on the periphery of a wheel, shaped so as to engage with a chain.

Noun	1.	sprocket - roller that has teeth on the rims to pull film or paper through
	2.	sprocket - thin wheel with teeth that engage with a chain Synonyms: sprocket wheel
	3.	sprocket - tooth on the rim of gear wheel Synonyms: cog

cog, comb, crag, fang, harrow, jag, peak, pecten, projection, rake, ratchet, sawtooth, snag, snaggle, spire, spur, steeple, tooth