What is the definition of an amphibian?

Answer 1

Amphibian, common name for any animal of the vertebrate class lying between fishes and reptiles. The class, with about 4,400 existing species, includes three living orders: the tailed amphibians, consisting of the salamanders (including newts) and sirens; the tailless amphibians, which include frogs and toads; and the caecilians, which are worm-like amphibians that are limbless and blind.