any of certain plants belonging to the genus Yucca, of the agave family, having narrow, spine-tipped leaves and a cluster of white flowers.
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British Dictionary definitions for Spanish bayonet
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012