Definitions

1. noun

A class of animals that have a life cycle including both aquatic and terrestrial environments, typically including a larval stage in water and an adult stage on land.

“The evolution of amphibians is a fascinating topic in the field of biology.”

2. noun

A member of the class Amphibia, including frogs, toads, salamanders, and newts.

“The amphibian population in the forest is declining due to habitat loss.”