plural noun

am·​phib·​ia am-ˈfi-bē-ə How to pronounce amphibia (audio)

Word History


borrowed from New Latin — more at amphibian

First Known Use

1607, in the meaning defined above

Time Traveler
The first known use of amphibia was in 1607

Dictionary Entries Near amphibia

Cite this Entry

“Amphibia.” Dictionary, Merriam-Webster, Accessed 8 Dec. 2023.

Kids Definition


noun plural
am·​phib·​ia am-ˈfib-ē-ə How to pronounce amphibia (audio)

Medical Definition


noun plural
Am·​phib·​ia am-ˈfib-ē-ə How to pronounce Amphibia (audio)
: a class of subphylum Vertebrata comprising forms (as the frogs, toads, newts, and salamanders) that are intermediate in many respects between fishes and reptiles, are cold-blooded with nucleated red blood cells and a 3-chambered heart, and that have gilled aquatic larvae and air-breathing adults
: the members of the class Amphibia
amphibian noun or adjective
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