1. A Greek word for a political assembly that holds formal sessions: Depending on the widely varied constitutions, the various Synehdrions applied to various representatives and/or judiciary organs of Greek and hellenistic city-states and treaty organizations.

Synehdrion was adopted by Hellenistic Jews and corrupted into Aramaic as sanhedrin.

2. Etymology: from Late Hebrew sanhedrin (gedola) "(great) council"; from Greek synehdrion, "assembly, council"; literally, "sitting together"; from syn-, "together" + hedra, "seat".

The Latinized forms are Synedrium (singular) and Synedria (plural).