ballista (better than balista; in Gloss. also ballistra), ae, f. [βάλλω],
I a lārge military engine , resembling a bow , stretched with cords and thongs , by which masses of stone and other missiles were thrown to a great distance; a machine for projectiles , the ballista (orig. diff. from catapulta, which was used for throwing arrows; but afterwards often interchanged with it; cf. Vitr. 10, 16-18; Veg. 4, 22): centenariae, throwing stones of a hundred pounds weight , Lucil. ap. Non. p. 555, 25: ballistae lapidum et reliqua tormenta telorum eo graviores emissiones habent, quo sunt contenta atque adducta vehementius, * Cic. Tusc. 2, 24, 57; Caes. B. C. 2, 2; Liv. 24, 40, 15; 21, 11, 10; Tac. A. 12, 56; 15, 9; id. H. 3, 23; 3, 29; 4, 23; Gell. 7 (6), 3; Sil. 1, 334; Luc. 2, 686; Vulg. 1 Macc. 6, 20; 6, 51.—Sportively: meus est ballista pugnus, cubitus catapulta est mihi, umerus aries, Plaut. Capt. 4, 2, 17. —For throwing other missiles, Caes. B. C. 2, 2; Luc. 2, 686; 3, 465.—
II Transf., the weapon thrown , a missile , Plaut. Trin. 3, 2, 42; Lucil. lib. XXVIII.: ballistas jactans centenarias. Sisenn. Hist. lib. IIII: ballistas quattuor talentarias, Non. p. 555, 24 sq.—
III Trop.: jam infortunii intenta ballista probe, an instrument , Plaut. Poen. 1, 1, 73; id. Bacch. 4, 4, 58.