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

• devil's weed
• tribulus terestris

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

• water chestnut
• water chestnut plant

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

• centauria calcitrapa
• star-thistle

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

• subshrub
• suffrutex

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

• aquatic plant
• hydrophyte
• hydrophytic plant
• water plant

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

• centaury

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

• genus tribulus
• tribulus

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

• genus trapa
• trapa

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

• jesuits' nut
• trapa natans
• water caltrop
• ling
• ling ko
• trapa bicornis