(συνέδριον/syn(h)édrion, lit. 'sitting together').
Term used for various kinds of meetings and of bodies capable of holding meetings. Thus in Athens it can be used of the Areopagus and the Council (Boule) of Five Hundred (Aeschin. In Ctes. 19–20), of the archons (Archontes) and their paredroi (Dem. Or. 59,83), or of any official doing business in his place of business (Lys. 9,6; 9,9).
There are several particular uses of the term. Many individual states called their council synhed…