order ephemeroptera order ephemerida • order equisetales · · · Info · Definitions · Characters · · order ephemeroptera · · Text Common · · Latin · · Scripts 19 · · Length 8 · · Syllables Definitions · · · (noun) mayflies. Synonyms: Ephemeroptera, order Ephemeroptera, Ephemerida, order Ephemerida. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 m latin small letter m U+006D 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