noun am·phib·i·an \-bē-ən\

: an animal (such as a frog or toad) that can live both on land and in water

: an airplane or vehicle that can be used both on land and water

Full Definition of AMPHIBIAN

:  an amphibious organism; especially :  any of a class (Amphibia) of cold-blooded vertebrates (as frogs, toads, or salamanders) intermediate in many characters between fishes and reptiles and having gilled aquatic larvae and air-breathing adults
:  an amphibious vehicle; especially :  an airplane designed to take off from and land on either land or water
amphibian adjective


ultimately from Greek amphibion amphibious being, from neuter of amphibios
First Known Use: 1835


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