rou ‧ lette /ruːˈlet/ BrE AmE noun [uncountable]
[ Date: 1700-1800 ; Language: French ; Origin: Old French roele 'small wheel' , from Latin rota ; ⇨ ↑ rotate ]
a game in which a small ball is spun around on a moving wheel, and people try to win money by guessing which hole the ball will fall into