Sauropterygia sauropterygia • sauropterygian · · · Info · Definitions · Characters · · Sauropterygia · · Text Latin · · Script 13 · · Length 7 · · Syllables Definitions · · · (noun) extinct marine reptiles: plesiosaurs; nothosaurs. Synonyms: order Sauropterygia. · · Noun Definition 1 Characters · · S latin capital letter s U+0053 a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079