noun. Latin plural of reptilium.

In zoology:

(a ) In Linnæus's system of classification (1766), the first order of the third class Amphibia, including turtles, lizards, and frogs. See Amphibia, 2 .

A class of cold-blooded oviparous or ovoviviparous vertebrated animals whose skin is covered with scales or scutes; the reptiles proper.

noun plural. A class of air-breathing oviparous vertebrates, usually covered with scales or bony plates. The heart generally has two auricles and one ventricle. The development of the young is the same as that of birds.

noun. Plural form of reptilium.

noun. Plural form of reptilian. (Animals of the class Reptilia)

noun. class of cold-blooded air-breathing vertebrates with completely ossified skeleton and a body usually covered with scales or horny plates; once the dominant land animals

"Aves are descendants of reptiles, but they are excluded from reptilia, so reptilia is not a clade."

class