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• n  a gambling game using cards; the object is to hold cards having a higher count than those dealt to the banker up to but not exceeding 21

• His treatises also include rules for quadrille, piquet, quinze, vingt-et-un, casino, put, all fours, Pope Joan, thirty-one, brag, commerce, Earl of Coventry, lansquenet .
• In vingt-et-un (21), to fail to stay on a "natural.

• blackjack
• twenty-one