first council of nicaea first council of lyons • first cousin · · · Info · Definitions · Characters · · first council of nicaea · · Text Common · · Latin · · Scripts 23 · · Length 7 · · Syllables Definitions · · · (noun) the first ecumenical council in 325 which produced the wording of the Nicene Creed and condemned the heresy of Arianism. Synonyms: Nicaea, First Council of Nicaea. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E 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