Reptiles

noun
1.
any cold-blooded vertebrate of the class Reptilia, comprising the turtles, snakes, lizards, crocodilians, amphisbaenians, tuatara, and various extinct members including the dinosaurs.
2.
(loosely) any of various animals that crawl or creep.
3.
a groveling, mean, or despicable person.
adjective
4.
of or resembling a reptile; creeping or crawling.
5.
groveling, mean, or despicable.
noun
1.
any of the cold-blooded vertebrates constituting the class Reptilia, characterized by lungs, an outer covering of horny scales or plates, and young produced in amniotic eggs. The class today includes the tortoises, turtles, snakes, lizards, and crocodiles; in Mesozoic times it was the dominant group, containing the dinosaurs and related forms
2.
a grovelling insignificant person: you miserable little reptile!
adjective
3.
creeping, crawling, or squirming
4.
grovelling or insignificant; mean; contemptible
reptile
(rěp’tīl’)
Any of various cold-blooded vertebrates of the class Reptilia, having skin covered with scales or horny plates, breathing air with lungs, and usually having a three-chambered heart. Unlike amphibians, whose eggs are fertilized outside the female body, reptiles reproduce by eggs that are fertilized inside the female. Though once varied, widespread, and numerous, reptilian lineages, including the pterosaurs, ichthyosaurs, plesiosaurs, and dinosaurs, have mostly become extinct (though birds are living descendants of dinosaurs). The earliest reptiles were the cotylosaurs (or stem reptiles) of the late Mississippian or early Pennsylvanian Period, from which mammals evolved. Modern reptiles include crocodiles, snakes, turtles, and lizards.

reptiles definition

A class of scaly vertebrates that usually reproduce by laying eggs. Lizards, snakes, turtles, and alligators are reptiles. Reptiles are cold-blooded animals.

Note: The dinosaurs were reptiles.