Noun | 1. | ![]() colubrid, colubrid snake - mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes genus Pituophis, Pituophis - bull snakes Pituophis melanoleucus, gopher snake - bull snake of western North America that invades rodent burrows pine snake - any of several bull snakes of eastern and southeastern United States found chiefly in pine woods; now threatened |