The Collaborative International Dictionary of English v.0.48:
Coluber \Col"u*ber\, n. [L., a serpent.] (Zool.) A genus of harmless serpents. [1913 Webster] Note: Linn[ae]us placed in this genus all serpents, whether venomous or not, whose scales beneath the tail are arranged in pairs; but by modern writers it is greatly restricted. [1913 Webster]WordNet (r) 3.0 (2006):
Coluber n 1: racers [syn: Coluber, genus Coluber]