Definition of the word derailleur

The word "derailleur" is derived from the French language, and it originated in the cycling industry in the early 20th century. It was coined by the French cyclist and engineer, Simon Loesser, who developed the first practical derailleur system in 1905. The device, which enables a cyclist to change gears without stopping, was initially called "dérailleur à couronne dentée," meaning "tooth-crowned derailer" in French. This name was a reference to the large chainring at the front of the bike, which was necessary for the system to function, and the gears' teeth that derived the chain's path to the rear wheel. However, the lengthy name proved challenging for French-speaking cyclists to pronounce, and in 1910, a shorter form, "derailleur," replaced the original name. This name was commonly adopted by the cycling industry, and it has since become an integral part of the English language, with cyclists around the world using the term "derailleur" to describe the device, which has revolutionized cycling's technology and efficiency. In summary, "derailleur" is a French word, which originated in the cycling industry over a century ago, and it now describes the device used to change gears on a bicycle. The name's simplicity and efficiency reflect the cycling industry's evolution and its commitment to creating practical and innovative technology for cyclists.