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derailleur

[ dih-rey-ler ]

noun

  1. a gear-shifting mechanism on a bicycle that shifts the drive chain from one sprocket wheel to another.

derailleur

/ dəˈreɪljə /

noun

  1. a mechanism for changing gear on bicycles, consisting of a device that lifts the driving chain from one sprocket wheel to another of different size

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Word History and Origins

Origin of derailleur1

1945–50; < French dérailleur literally, a device causing disengagement or derailing, equivalent to déraill ( er ) to derail + -eur -eur

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Word History and Origins

Origin of derailleur1

French dérailleur derailer

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derailderailment

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