Definitions

1. noun

A four-limbed animal, especially a vertebrate.

“Frogs, toads, and newts are all tetrapods that have adapted to life in water.”

2. noun

An animal with four limbs or four appendages, especially in the early stages of its development, such as a tetrapod larva.

“Tadpoles are the larval stage of tetrapods and are typically aquatic.”