blackjack
/ˈblækdʒæk/noun
1
- mass noun chiefly N. Amer. a gambling card game in which players try to acquire cards with a face value totalling 21 and no more〈主北美〉21点（牌戏）（参见PONTOON, VINGT-ET-UN）。
2
- a widely distributed weed related to the bur-marigold, with barbed black seeds.咸丰草, 白花婆婆针, 鬼针草。
- ORIGIN: perhaps from sense 3, drawing a comparison between the shape of the seeds and a bludgeon.
2.1
- Bidens pilosa, family Compositae.拉丁名Bidens pilosa,菊科。
3
- N. Amer. a flexible lead-filled truncheon, used as a weapon〈北美〉弹性灌铅棍（用作武器）。
4
- historical a pirates' black ensign〈史〉海盗旗。
5
- historical a tarred-leather container used for alcoholic liquor〈史〉皮酒囊。