tetrapod

Any of numerous organisms of the group Tetrapoda, usually characterized as those species that have four limbs with digits and those, such as whales and snakes, that are descended from such species. Tetrapoda includes the amphibians, reptiles, birds, and mammals.

A vertebrate animal with four feet, legs, or leglike appendages.

Four-footed; quadruped; specifically, having only four perfect legs, as certain butterflies; of or pertaining to the Tetrapoda.

A four-footed animal; a quadruped; specifically, a member of the Tetrapoda.

An insect characterized by having but four perfect legs, as certain of the butterflies.