Sinonim council of chalcedon

English Thesaurus

1. the fourth ecumenical council in 451 which defined the two natures (human and divine) of Christ (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)