caltrops
n.
三角釘
英語翻譯 名詞 caltrop:
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tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed
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a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits
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Mediterranean annual or biennial herb having pinkish to purple flowers surrounded by spine-tipped scales; naturalized in America
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