Lewis Short
(adjective) : Apŏnus, i, m., = ἄπονος (pain-curing).
* A warm, medicinal fountain in the vicinity of Padua, now Bagni d' Albano: Patavinorum aquae calidae,Plin. 2, 103, 106, § 227: Aponi fons,Suet. Tib. 14: Aponi fontes,Mart. 6, 42, 4; Cassiod. Var. 2, 39; cf. Mann. Ital. 1, 91.—Hence
* Apŏ-nus, a, um, , Aponian: tellus,Mart. 1, 62, 3: Aponinus, dub. in Vop. Firm. Sat. c. 3.
Charlton T. Lewis, Charles Short, A Latin Dictionary