spline (n.)youdaoicibaDictYouDict[spline 词源字典]
long, thin piece of wood or metal, 1756, from East Anglian dialect, of uncertain origin. Perhaps from older Danish splind or North Frisian splinj. Especially one fitted into a groove on a wheel and a shaft to keep them revolving together (1864).[spline etymology, spline origin, 英语词源]