caltrop, n.
(caltrops)
(caltrops)

<noun.plant>
Centauria calcitrapa caltrop star-thistle
semantic pointers
hypernym

<noun.plant>
caltrop water chestnut water chestnut plant
semantic pointers
member holonym
hypernym
hyponym

<noun.plant>
Tribulus terestris caltrop devil's weed