2. Of, relating to, or belonging to the Colubridae.
3. Mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes.
A colubrid is a snake that is a member of the Colubridae family and it is a broad classification of snakes that includes well over half of all snake species on earth.
While most colubrids are non-venomous (or have venom that isn't known to be harmful to humans) and are normally harmless, some of the groups; such as, genus Boiga and sub-family Homalopsinae, can produce medically significant bites. In addition, the African Boomslang and African Twig Snake have both caused human fatalities.
2. A very large family of terrestrial snakes in the order Squamata, containing about 75 percent of all known snakes.