The Collaborative International Dictionary of English v.0.48:

colubrid \colubrid\ n.
   any member of a large family (Colubridae) of mostly
   harmless temperate-to-tropical terrestrial or arboreal or
   aquatic snakes.

   Syn: colubrid snake.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

colubrid
    n 1: mostly harmless temperate-to-tropical terrestrial or
         arboreal or aquatic snakes [syn: colubrid snake,
         colubrid]