/ ruːˈlet; NAmE / noun
[ U ] a gambling game in which a ball is dropped onto a moving wheel that has holes with numbers on it. Players bet on which hole the ball will be in when the wheel stops.
—see also Russian roulette
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WORD ORIGIN
mid 18th cent.: from French , diminutive of rouelle wheel, from late Latin rotella , diminutive of Latin rota wheel.