The Collaborative International Dictionary of English v.0.48:

Colubridae \Colubridae\ n.
   a broad family including only nonvenomous snakes, containing
   about two-thirds of all living species. It includes the
   bullsnakes, garter snakes, and water snakes as well as many
   other species.

   Syn: family Colubridae.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Colubridae
    n 1: nonvenomous snakes; about two-thirds of all living species
         [syn: Colubridae, family Colubridae]