Archosaur

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A reptile of the taxon Archosauria, which includes modern crocodilians and birds, as well as the extinct pterosaurs, non-avian dinosaurs and other taxa.

    "The predominance of archosaurs over other reptiles might be a consequence of their more advanced mode of locomotion compared with their relatives."

  2. 2
    extinct reptiles including: dinosaurs, plesiosaurs, pterosaurs, ichthyosaurs, thecodonts wordnet

Synonyms

All synonyms
archosaurianarchosaurian reptile

Example

More examples

"Which of these five fossils is an archosaur?"

Etymology

From translingual Archosauria (“taxonomic division of extinct reptiles”), from Ancient Greek ἄρχων (árkhōn, “leader”) + σαύρα (saúra, “lizard”).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.