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Definition of archosaur in English: archosaurnoun ˈɑːkəsɔːˈärkəˌsôr Zoology A reptile of a large group that includes the dinosaurs and pterosaurs and is represented today only by the crocodilians. Subdivision Archosauria, subclass Diapsida Example sentencesExamples - 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.
- Tyrannosaurs are surprisingly common in many North American fossil beds, especially their large, serrated teeth which they shed periodically like most archosaurs.
- 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).
Origin 1930s: from modern Latin Archosauria, from Greek arkhos 'chief' or arkhōn 'ruler' + -saur. Definition of archosaur in US English: archosaur(also archosaurus) nounˈärkəˌsôr Zoology A reptile of a large group that includes the dinosaurs and pterosaurs and is represented today only by the crocodilians. Subdivision Archosauria, subclass Diapsida Example sentencesExamples - 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.
- The name ‘bird crocodile’ seems to nicely describe all the great archosaurs of Mesozoic, combining as they did features of both crocodiles and birds.
- 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).
Origin 1930s: from modern Latin Archosauria, from Greek arkhos ‘chief’ or arkhōn ‘ruler’ + -saur. |