Definition of archosaur in English:
nounZoology & Palaeontology
A reptile of a large group that includes the dinosaurs and pterosaurs and is represented today only by the crocodilians.
- Other archosaurs included the pterosaurs, relatives of dinosaurs but not true dinosaurs.
- At the same time, the broad, dry plains of equatorial Pangea provided a proving ground for a strange new group of lightweight, but large-bodied, archosaurs - the dinosaurs.
- The archosaur skull includes two new fenestra (skull openings).
Definition of archosaur in:
- US English dictionary