Siphonophora Siphonognathus • siphonophoran · · · Info · Definitions · Characters · · Siphonophora · · Text Latin · · Script 12 · · Length Definitions · · · (noun) marine colonial hydrozoans. Synonyms: order Siphonophora. · · Noun Definition 1 Characters · · S latin capital letter s U+0053 a latin small letter a U+0061 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072