(redirected from Dérailleur)
Related to Dérailleur: derailleur, Rear derailleur


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

[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.


(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


(dɪˈreɪ lər)

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.


[dəˈreɪljəʳ] n derailleur gears npl (Cycling) → deragliatore m
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995