[mass noun]
〈主北美〉 21点(牌戏)(参见<Bold>PONTOON, VINGT-ET-UN</Bold>)。
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.]
〈北美〉 弹性灌铅棍(用作武器)。
〈史〉 海盗旗。
〈史〉 皮酒囊。