any of several American liliaceous plants of the genus Yucca, esp Y. aloifolia, that have a tall woody stem, stiff pointed leaves, and large clusters of white flowers: cultivated for ornament
See also Adam's-needle
Spanish bayonet in American English
any of a number of yuccas, esp. any of two species (Yucca aloifolia or Y. gloriosa) with stiff, sword-shaped leaves