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sprocket

[sprok-it]
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noun
  1. Machinery.
    1. Also called chainwheel, 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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Origin of sprocket

First recorded in 1530–40; origin uncertain
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

cogsprocketcogwheelpiniongearwheel

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Historical Examples


British Dictionary definitions for sprocket

sprocket

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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Word Origin

C16: of unknown origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for sprocket

1530s, originally a carpenters' word for a piece of timber used in framing, of unknown origin. The meaning "projection from the rim of a wheel that engages the links of a chain" is first recorded 1750.

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Online Etymology Dictionary, © 2010 Douglas Harper