călĭgŭla, ae, f. dim. [caliga],
I a small military boot; only post-class. ap. Ambros. Ep. 7, 53; Hor. S. 1, 3, 128; Schol. ad Juv. 3, 67.—Hence,
II As nom. propr. : Călĭgŭ-la , ae, m., a cognomen of the successor of Tiberius , since from his earliest youth he was engaged in military service; cf. Suet. Calig. 9; Tac. A. 1, 41; 1, 69; Aur. Vict. Caes. 3.