Lewis Short
(adjective) : vīpĕrīnus, a, um, id..
* Of a viper, serpent, or snake.
* Adj.: caro,Plin. 7, 2, 2, § 27: sanguis,Hor. C. 1, 8, 9; cf. cruor,id. Epod. 3, 6: sanies,Plin. 11, 53, 115, § 279: morsus, Att. ap. Cic. Fin. 2, 29, 94; id. Tusc. 2, 7, 19: nodo coërces viperino Bistonidum,Hor. C. 2, 19, 19.
* Serpent - formed, serpent-like: cauda (chamaeleonis) implicans se viperinis orbibus,Plin. 8, 33, 51, § 121.
Charlton T. Lewis, Charles Short, A Latin Dictionary