noun
extinct marine reptiles: plesiosaurs; nothosaurs
• Syn: ↑Sauropterygia
• Hypernyms: ↑animal order
• Member Holonyms: ↑Archosauria, ↑subclass Archosauria
• Member Meronyms: ↑Plesiosauria, ↑suborder Plesiosauria, ↑Nothosauria, ↑suborder Nothosauria
Useful english dictionary. 2012.