In ancient warfare, a small four-pronged instrument used to obstruct the advance of cavalry by piercing the feet of the horses.

【军】拦路钩；铁蒺藜(古代有四角之兵器，用以刺马足，阻马队之前进)。

Any of several plants with spiny heads, as the star thistle.

【植】蒺藜(如星蓟)。

Same as calthrop.

亦可作 calthrop。