derailleur

• dérailleur
• derailer (uncommon)

Borrowed from French dérailleur. Doublet of derailer.

• (Received Pronunciation) IPA^(key): /ˌdəˈɹeɪl.jə/, /ˌdiˈɹeɪl.jə/

• Audio (Southern England)

  (file)

• (General American) IPA^(key): /ˌdəˈɹeɪ.lɚ/, /ˌdiˈɹeɪ.lɚ/

derailleur (plural derailleurs)

1. The mechanism on a bicycle used to move the chain from one sprocket (gear) to another.
   • 1993, John Forester, “Adjusting Derailleurs”, in Effective Cycling, MIT Press, →ISBN, page 14:

     The common rear derailleur designs all operate on the same principle. A moveable cage receives the chain returning from the chainwheel and directs it onto one sprocket of the cluster.

2. The entire gearset on a bicycle with such a mechanism.

• dérailleur (superseded)

Borrowed from French dérailleur.

• IPA^(key): /ˌdeː.raːˈjøːr/

• Audio

  (file)

• Hyphenation: de‧rail‧leur
• Rhymes: -øːr

derailleur m (plural derailleurs)

1. derailleur (mechanism to move from one gear to another)

• naafversnelling