9 letters · 14 points in Scrabble
noun extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts
originFrom taxonomic name Archosauria (“taxonomic division of extinct reptiles”), from Ancient Greek ἄρχων (árkhōn, “leader”) + σαύρα (saúra, “lizard”).
Etymology from Wiktionary, CC BY-SA 3.0