Noun archosaur has 1 sense
  1. archosaur, archosaurian, archosaurian reptile - extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts
    --1 is a kind of diapsid, diapsid reptile
    --1 is a member of Archosauria, subclass Archosauria
    --1 has particulars:
     dinosaur; pterosaur, flying reptile; thecodont, thecodont reptile; ichthyosaur; plesiosaur, plesiosaurus; nothosaur
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