1. extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts

(synonym) archosaur , archosaurian reptile

(hypernym) diapsid , diapsid reptile

(hyponym) dinosaur

(member-holonym) Archosauria , subclass Archosauria

1. of or relating to reptiles of the subclass Archosauria

(pertainym) Archosauria , subclass Archosauria