derailleur
noun/dɪˈreɪljə(r)/
/dɪˈreɪlər/
(specialist)- a type of gear on a bicycle that works by lifting the chain from one gearwheel to another larger or smaller oneWord Origin1930s: from French, from dérailler ‘derail’.
Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
Check pronunciation:
derailleur