noun, plural bal·lis·tae [buh-lis-tee] /bəˈlɪs ti/.
Origin of ballista
Examples from the Web for ballista
No ballista, however, is made without regard to the given amount of weight of the stone which the engine is intended to throw.Ten Books on Architecture|Vitruvius
Like a modern field gun, the ballista shot low and directly toward the enemy.Artillery Through the Ages|Albert Manucy
The ballista (Fig. 229) was in reality a large cross-bow, built to shoot long, heavy bolts or arrows.The Boy Craftsman|A. Neely Hall
The ballista was considerably larger and more expensive than this.
Various names were applied to these weapons, the chief of which were the ballista and the catapult.Great Inventions and Discoveries|Willis Duff Piercy