adjective
Definition: Relating to or resembling reptiles, which are cold-blooded animals like snakes, lizards, and turtles.
Example: The scientist studied the reptilian features of the ancient fossils.
noun
Definition: An animal that is part of the class of cold-blooded vertebrates that includes snakes, lizards, turtles, and crocodiles.
Example: The museum had a fascinating exhibit on reptilians, showcasing various species of reptiles.