Caltrop - Definition
caltrop
n 1: tropical annual procumbent poisonous subshrub having fruit
that splits into five spiny nutlets; serious pasture weed
[syn: caltrop, devil's weed, Tribulus terestris]
2: a plant of the genus Trapa bearing spiny four-pronged edible
nutlike fruits [syn: water chestnut, water chestnut
plant, caltrop]
3: Mediterranean annual or biennial herb having pinkish to
purple flowers surrounded by spine-tipped scales; naturalized
in America [syn: star-thistle, caltrop, Centauria
calcitrapa]