ballistārĭus — Lewis & Short
ballistārĭus (balist-; and in Gloss. ballistrārĭus), ii, m.1. ballista.
A A maker of ballistœ, Dig. 50, 6, 6:
COLLEGIVM BALLISTARIORVM.,Inscr. Orell. 4066.—
B One who discharges the ballista, a slinger, Veg. Mil. 2, 2; Amm. 16, 2, 5.