derailleur

de·rail·leur

 (dĭ-rā′lər)

n.

A device for shifting gears on a bicycle by moving the chain between sprocket wheels of different sizes.

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[French dérailleur, from dérailler, to derail; see derail.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

derailleur

(dəˈreɪljə)

n

(Mechanical Engineering) 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

[French dérailleur derailer]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

de•rail•leur

(dɪˈreɪ lər)

n.

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

[1945–50; < French dérailleur literally, a device causing disengagement or derailing]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

Translations

derailleur

[dəˈreɪljəʳ] n derailleur gears npl (Cycling) → deragliatore m

Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995