Definitions

1. noun

A vertebrate animal belonging to the group Amniota, characterized by the presence of an amnion, a membrane that encloses the embryo during development.

“The amniote embryo develops inside the eggshell, protected by the amnion and other membranes.”

2. noun

A member of a group of vertebrates that includes reptiles, birds, and mammals.

“Amniotes are the most diverse group of vertebrates, with many species found on land and in water.”