noun, plural bal·lis·tae [buh-lis-tee] /bəˈlɪs ti/.
Origin of ballista
Examples from the Web for ballistae
Their ballistae threw stones, weighing a hundred weight, a distance of a quarter of a mile.For the Temple|G. A. Henty
I have now given those symmetrical proportions of ballistae and catapults which I thought most useful.
They are usually classed as (a) catapults and (b) ballistae (λιθοβόλοι).
But Belisarius placed upon the towers engines which they call "ballistae."Procopius|Procopius
In this way the blows of ballistae and the force of fires will be repelled by them.