caltrop

English Thesaurus

1. Mediterranean annual or biennial herb having pinkish to purple flowers surrounded by spine-tipped scales; naturalized in America (noun.plant)

hypernym	:	centaury,
definition	:	any plant of the genus Centaurea (noun.plant)

2. a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits (noun.plant)

hypernym	:	aquatic plant, hydrophyte, hydrophytic plant, water plant,
definition	:	a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth (noun.plant)

hyponym	:	jesuits' nut, trapa natans, water caltrop,
definition	:	a variety of water chestnut (noun.plant)

hyponym	:	ling, ling ko, trapa bicornis,
definition	:	water chestnut whose spiny fruit has two rather than 4 prongs (noun.plant)

member meronym	:	genus trapa, trapa,
definition	:	small genus of Eurasian aquatic perennial herbs: water chestnut (noun.plant)

3. tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed (noun.plant)

hypernym	:	subshrub, suffrutex,
definition	:	low-growing woody shrub or perennial with woody base (noun.plant)

member meronym	:	genus tribulus, tribulus,
definition	:	annual or perennial herbs or subshrubs of warm regions (noun.plant)