Lewis & Short

caestus (not cestus), ūs, m. (dat. plur. caestis, Varr. ap. Non. p. 492, 11) [caedo], a strap of bull’s hide loaded with balls of lead or iron, wound around the hands and arms, a gauntlet, boxing-glove for pugilists (pugiles), Cic. Tusc. 2, 17, 40; Verg. A. 5, 69; 5, 379; 5, 479; Prop. 3 (4), 14, 9; Ov. F. 2, 367; Tac. A. 14, 20; Stat. Th. 6, 764; 6, 829; Val. Fl. 4, 251; Plin. 11, 37, 45, § 124; Sen. Med. 89; cf. Fest. p. 35; Dict. of Antiq.