amphibian
Definitions
A cold-blooded vertebrate of a class that comprises the frogs, toads, newts, salamanders, and caecilians, typically beginning life as an aquatic larva and undergoing metamorphosis into an adult.
An aircraft or vehicle capable of operating on both land and water.
Examples
A frog is a common type of amphibian that spends part of its life in water and part on land.
The scientist studied the rare amphibian to understand how it adapts to changing environmental conditions.