ALL meanings of calthrop
cal·trop
C c - noun calthrop any of several plants having spiny heads or fruit, as those of the genera Tribulus and Kallstroemia, or the star thistle, Centaurea calcitrapa. 1
- noun calthrop 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. 1
- noun calthrop Alternative form of caltrop. 0