any of several plants having spiny heads or fruit, as those of the genera Tribulus and Kallstroemia, or the star thistle, Centaurea calcitrapa.
an iron ball with four projecting spikes so disposed that when the ball is on the ground one of them always points upward: used to obstruct the passage of cavalry, armored vehicles, etc.
更多caltrop例句
A telegram was accordingly despatched to Mrs. Caltrop, asking her to forward the address of the doctor in question.
Sooner or later, the worm forsakes this kind of caltrop which catches on to everything.