1. a cold-blooded animal that can live both on land and in water, such as a frog or salamander
Usage: biology
2. a vehicle that can operate on both land and water

1. able to live or operate both on land and in water

Examples

• Frogs are amphibians that start life as tadpoles in water.
• The salamander is a common amphibian found in moist environments.
• Many amphibians breathe through their skin as well as their lungs.
• The military used amphibian vehicles to cross rivers during the war.
• The amphibian aircraft could land on both runways and lakes.
• Scientists study amphibian populations to monitor environmental health.
• The amphibian assault ship carried troops across the water to shore.