Of or pertaining to the Amphibia; as, amphibian reptiles.
- A cold-blooded, smooth-skinned vertebrate of the class Amphibia, such as a frog or salamander, that characteristically hatches as an aquatic larva with gills. The larva then transforms into an adult having air-breathing lungs.
- An animal capable of living both on land and in water.
- An aircraft that can take off and land on either land or water.
- A tracked or wheeled vehicle that can operate both on land and in water.