Nounflower-shaped family crest

Nouncaltrop

NounRed Crystal (politically and religiously neutral emblem used by the International Committee of the Red Cross)

Nouncaltrop (Tribulus terrestris); cat's head; devil's thorn; devil's weed; goathead; land caltrop; puncturevine

Nounwater caltrop (Trapa natans); water chestnut; caltrop

NounTrapa incisa (species of plant closely related to the water caltrop)

NounMitsubishi

Nouncaltrop (spiked device scattered to maim infantry and horses); calthrop; caltrap