1. caltrop

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


  • subshrub
  • devil's weed
  • suffrutex
  • Tribulus
  • Tribulus terestris

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2. caltrop

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


  • hydrophytic plant
  • Trapa bicornis
  • aquatic plant
  • genus Trapa
  • water plant
  • Trapa natans
  • ling ko
  • water chestnut
  • hydrophyte
  • ling
  • Trapa
  • Jesuits' nut
  • water caltrop

3. caltrop

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


  • centaury
  • Centauria calcitrapa

Example sentences of the word caltrop

1. Noun, singular or mass
Many people consider the plant Tribulus terrestris or bindii, a member of the caltrop family, an aphrodisiac.