Definition of: reptilian

(rep·til′ē·ən) adjective
1. Of or pertaining to a class (Reptilia) of cold-blooded, air-breathing vertebrates, the reptiles, having fully ossified skeletons and bodies usually covered with horny plates or scales. In addition to the limbless snakes, the class includes crocodiles, alligators, lizards, and turtles.
2. Malicious; base; mean.
—noun One of the Reptilia; any reptile.