Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

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.

cŏlū̆bra, ae, f. [coluber], a female serpent; and in gen., a serpent, snake, Lucil., Turp., and Varr. ap. Non. p. 201, 22 sq.; Hor. C. 1, 17, 8; id. S. 1, 8, 42; Ov. M. 6, 559; Juv. 5, 103; Cels. 5, 27, 3; Col. 10, 230; Plin. 32, 5, 19, § 53.
As an attributive of the hair of the Furies, Medusa, etc. (v. coluber), Ov. M. 4, 474; 4, 491; 4, 783; Luc. 9, 634.
Hence, prov.: quas tu edes colubras? i. e. art thou frantic? Plaut. Stich. 2, 1, 50 Ritschl N. cr.; and: colubra restem non parit, i.e. like produces like, the thorn does not produce grapes, Petr. 45, 9.