Lewis Short
ballistārĭus | balist- | ballistrārĭus (noun M) : (; and in Gloss. ), , 1. ballista.
* A maker of ballistoe, Dig. 50, 6, 6: COLLEGIVM BALLISTARIORVM.,Inscr. Orell. 4066.
* One who discharges the ballista, a slinger, Veg. Mil. 2, 2; Amm. 16, 2, 5.
Charlton T. Lewis, Charles Short, A Latin Dictionary