“ecumenic, œcumenic, a.†listed in the Oxford English Dictionary, second edition (1989)
Full definition of Å“cumenic
Adjective
Å“cumenic
1835, Isaac Taylor, Spiritual despotism, second edition, chapter VI, page 263 (Holdsworth and Ball)... that great economy of provincial government and of Å“cumenic relationship ...
1905, Emil Reich, Select Documents Illustrating Mediaeval and Modern History, page 130The first œcumenic council accordingly met at Nicæa, the Emperor’s summer dwelling-place in Bithynia.
1992, Jules Michelet and G. H. Smith, History of France from the earliest period to the present time, page 106 (D. Appleton & Co.)If ever general council was Å“cumenic, it was this of Constance.