first council of nicaea

English Thesaurus

1. the first ecumenical council in 325 which produced the wording of the Nicene Creed and condemned the heresy of Arianism (noun.group)

hypernym	:	ecumenical council,
definition	:	(early Christian church) one of seven gatherings of bishops from around the known world under the presidency of the Pope to regulate matters of faith and morals and discipline (noun.group)