caltrops
基本解释
n. 三角钉
英文释义
n. tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed
n. a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits
n. Mediterranean annual or biennial herb having pinkish to purple flowers surrounded by spine-tipped scales; naturalized in America
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