roulette (n.)youdaoicibaDictYouDict[roulette 词源字典]
1734, "small wheel," from French roulette "gambling game played with a revolving wheel," literally "small wheel," from Old French roelete "little wheel" (12c.), formed on model of Late Latin rotella, diminutive of Latin rota "wheel" (see rotary). The game of chance so-called from 1745.[roulette etymology, roulette origin, 英语词源]