Lewis & Short

cŏlŭber, bri, m. [akin to celer],

  1. I. a serpent, snake (poet.), Verg. G. 2, 320; 3, 418; id. A. 2, 471 (an imitation of Hom. Il. 22, 93: ὡς δὲ δράκων, κ.τ.λ.); Ov. M. 4, 620; 11, 775; Col. 10, 231.
  2. II. Esp., as an attributive of the hair of Medusa, the Furies, the Hydra, etc., Lucr. 5, 27; Ov. M. 9, 73; 10, 21; Luc. 6, 664; Val. Fl. 6, 175.