sprocket

American  

[sprok-it] / ˈsprɒk ɪt /

noun

1. Machinery.

   1. Also called chainwheel.  Also called sprocket wheel.  a toothed wheel engaging with a conveyor or power chain.

   2. one tooth of such a wheel.

2. Carpentry. a wedge-shaped piece of wood extending a sloping roof over the eaves with a flatter pitch.

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sprocket British  

/ ˈsprɒkɪt /

noun

1. Also called: sprocket wheel.  a relatively thin wheel having teeth projecting radially from the rim, esp one that drives or is driven by a chain

2. an individual tooth on such a wheel

3. a cylindrical wheel with teeth on one or both rims for pulling film through a camera or projector

4. a small wedge-shaped piece of wood used to extend a roof over the eaves

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Etymology

Origin of sprocket

First recorded in 1530–40; origin uncertain