This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Any of various toothlike projections arranged on a wheel rim to engage the links of a chain.

n. A cylinder with a toothed rim that engages in the perforations of photographic or movie film to pull it through a camera or projector.

n. A toothed wheel that enmeshes with a chain or other perforated band.

n. The tooth of such a wheel.

n. A flared extension at the base of a sloped roof.

n. A placeholder name for an unnamed, unspecified, or hypothetical manufactured good or product.

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

n. A sprocket wheel.

n. One of a series of projections in a grooved recess round the lower part of a ship's capstan, by which the chain-cable is grasped while heaving up anchor.

n. One of the projections on a sprocket-wheel which engage the chain.

n. roller that has teeth on the rims to pull film or paper through

n. thin wheel with teeth that engage with a chain

n. tooth on the rim of gear wheel

"There is a drop down menu from the top middle bar of your working window (with a little 'sprocket' symbol)."

roller    wheel    tooth   

sprocket wheel   

toot   

docket    pocket    rocket    socket   

pinion    pulley    sheave    axle    cog    detent    gearbox    idler    cogwheel    bogie