Dinosaur vs. Reptile — What's the Difference?

Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago, although the exact origin and timing of the evolution of dinosaurs is the subject of active research.

Reptiles, as most commonly defined, are the animals in the class Reptilia , a paraphyletic grouping comprising all amniotes except synapsids (mammals and their extinct relatives) and Aves (birds). The class comprises turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives.

Any of various extinct terrestrial reptiles of the orders Saurischia and Ornithischia that existed during the Mesozoic Era, including both carnivores and herbivores and often reaching a gigantic size.

Any of various usually cold-blooded egg-laying vertebrates often grouped in the class Reptilia, having dry skin covered with scales or horny plates and breathing by means of lungs, and including the snakes, lizards, crocodilians, and turtles. In some classification systems, birds are considered to be reptiles because they are descended from reptilian dinosaurs.

Any of various other large extinct reptiles, such as an ichthyosaur.

A person regarded as contemptible or obsequious.

A relic of the past

(strictly) A cold-blooded vertebrate of the class Reptilia; an amniote that is neither a synapsid nor a bird; excludes amphibians.

One that is hopelessly outmoded or unwieldy

A reptile or amphibian.

(scientific) any of the animals belonging to the clade Dinosauria, especially those that existed during the Triassic, Jurassic and Cretaceous periods and are now extinct.

(figuratively) A mean or grovelling person.

(colloquial) any member of the clade Dinosauria other than birds.

Creeping; moving on the belly, or by means of small and short legs.

(proscribed) Any extinct reptile, not necessarily belonging to Dinosauria, that existed between about 230 million and 65 million years ago.

Grovelling; low; vulgar.

Something or someone that is very old or old-fashioned, or is not willing to change and adapt.

Creeping; moving on the belly, or by means of small and short legs.

Anything no longer in common use or practice.

Hence: Groveling; low; vulgar; as, a reptile race or crew; reptile vices.

One of the Dinosauria.

An animal that crawls, or moves on its belly, as snakes,, or by means of small, short legs, as lizards, and the like.

Any of numerous extinct terrestrial reptiles of the Mesozoic era

One of the Reptilia, or one of the Amphibia.

A groveling or very mean person.

Any cold-blooded vertebrate of the class Reptilia including tortoises turtles snakes lizards alligators crocodiles and extinct forms