A cold-blooded vertebrate animal of a class that comprises the frogs, toads, newts, and salamanders. They are distinguished by having an aquatic gill-breathing larval stage followed (typically) by a terrestrial lung-breathing adult stage.

The pond was teeming with amphibians, including several species of frogs and salamanders.

A vehicle that can operate both on land and in water.

The military used an amphibian to transport troops across the river.

amphibianadjective

Relating to or characteristic of amphibians, which are cold-blooded vertebrates that can live both in water and on land.

Scientists are researching amphibian embryos to understand how these animals develop both gills and lungs.

Having or combining two distinct qualities or functions, especially able to operate or exist in both land and water environments.

The city encourages an amphibian lifestyle, blending on-road cycling with river travel.