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noun
ZoologyA reptile of a large group that includes the dinosaurs and pterosaurs and is represented today only by the crocodilians.
- ‘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 name ‘bird crocodile’ seems to nicely describe all the great archosaurs of Mesozoic, combining as they did features of both crocodiles and birds.’
- ‘The archosaur skull includes two new fenestra (skull openings).’
- ‘Other archosaurs included the pterosaurs, relatives of dinosaurs but not true dinosaurs.’
- ‘Tyrannosaurs are surprisingly common in many North American fossil beds, especially their large, serrated teeth which they shed periodically like most archosaurs.’
Origin
1930s: from modern Latin Archosauria, from Greek arkhos chief or arkhōn ruler + -saur.
Pronunciation:
Further reading
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