Ichthyosauria ichthyosaur • ichthyosaurian · · · Info · Definitions · Characters · · Ichthyosauria · · Text Latin · · Script 13 · · Length Definitions · · · (noun) extinct marine reptiles: ichthyosaurs. Synonyms: order Ichthyosauria. · · Noun Definition 1 Characters · · I latin capital letter i U+0049 a latin small letter a U+0061 c latin small letter c U+0063 h latin small letter h U+0068 i latin small letter i U+0069 o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079