συνέδριον
Alt. συνέδριον, ου, τό,
1. "a body of men assembled in council, a council-board, council", Xen., etc.; of the Roman "Senate", Polyb.; the Jewish "Sanhedrim", NTest.:—esp. of "a congress" of Allies or Confederates, Hdt., Dem., etc.
2. "a council-chamber", Hdt., Xen.
Etym. from σύνεδρος