caltrop   (TTS Sound)

The noun caltrop has 3 senses

• caltrop, devil's weed, Tribulus terestris -- (tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed)


• water chestnut, water chestnut plant, caltrop -- (a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits)


• star-thistle, caltrop, Centauria calcitrapa -- (Mediterranean annual or biennial herb having pinkish to purple flowers surrounded by spine-tipped scales; naturalized in America)