sprocket
noun
/ˈspɹɒkɪt/
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- (mechanical engineering) A toothed wheel that enmeshes with a chain or other perforated band.
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pignon
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- (usually, in the plural) The tooth of such a wheel.
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pignon,
dent
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- (architecture) A flared extension at the base of a sloped roof.
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coyau
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