Chalcedon

[ kal-si-don, kal-seed-n ]

/ ˈkæl sɪˌdɒn, kælˈsid n /

an ancient city in NW Asia Minor, on the Bosporus, opposite Byzantium.

Council of, the ecumenical council held there in a.d. 451.

Related forms

Chal·ce·do·ni·an

[kal-si-doh-nee-uh n] /ˌkæl sɪˈdoʊ ni ən/, adjective, noun

He appointed Paul to the bishopric, and required the Egyptians to receive the decrees of the council of Chalcedon.
History Of Egypt From 330 B.C. To The Present Time, Volume 11 (of 12)|S. Rappoport
Even then all parties were careful not to mention Chalcedon.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5|Various
No doubt these, too, are offending the champions of the Council of Chalcedon.
The Inside of the Cup, Complete|Winston Churchill
He was devoted to the Council of Chalcedon, and ever honoured in the East as orthodox.
The Formation of Christendom, Volume VI|Thomas W. (Thomas William) Allies

Under the cover of this precedent, a treacherous blow was aimed at the council of Chalcedon.
The History of The Decline and Fall of the Roman Empire|Edward Gibbon