Lewis & Short

tollēno, ōnis, m. [tollo], in mechanic. and milit. lang., a swing-beam, a swipe or swape, e. g. to raise a water-bucket from a well, or to raise a body of men to a level with the enemy’s ramparts, Plin. 19, 4, 20, § 60; Plaut. Fragm. ap. Fest. s. v. reciprocare, p. 274 Müll.; Veg. Mil. 4, 21; Liv. 24, 34, 10; 38, 5, 4; Sil. 14, 320 sq.; cf. Fest. p. 356 Müll.