Definitions

1. noun

The clade of animals that includes reptiles and birds, characterized by laying eggs and having a diapsid skull.

“The sauropsida evolved from a common ancestor with synapsids around 300 million years ago.”

2. noun

A taxonomic rank in biology, used to group organisms that share common characteristics and evolutionary history.

“The sauropsida clade is divided into several subgroups, including Crocodylia and Aves.”