Definition

1. Proper noun:
   • A historical city: An ancient town located on the Asian shore of the Bosporus strait, opposite Byzantium. It is now a district within the modern city of Istanbul, Turkey.
   • Site of a significant church council: The location of the Fourth Ecumenical Council of the Christian church in AD 451.

Usage

• As a geographical/historical location:
  • The ancient city of Chalcedon was founded by Greek colonists.
  • We visited the archaeological sites in Chalcedon.
• As a reference to the church council:
  • The doctrinal definitions from Chalcedon were pivotal for Christian theology.
  • The Council of Chalcedon addressed the nature of Christ.

Advanced Usage

• "Chalcedonian" (adjective): Pertaining to the Council of Chalcedon or its definitions.
  • The Chalcedonian Creed is a foundational statement of Christology.
• Used in historical and theological contexts to specify a location or a specific ecclesiastical event.

Variants and Related Words

• Chalcedonian (adj.): Relating to Chalcedon or the Council of Chalcedon.
  • The Chalcedonian definition.
• Chalcedony (n.): A type of microcrystalline quartz, etymologically derived from the city's name, where it was supposedly first found or traded.
  • The gemstone chalcedony comes in many varieties like agate and onyx.

Synonyms

• (For the city) Kadıköy (its modern Turkish name).
• (For the council) The Fourth Ecumenical Council.

Notes

• The term is primarily used in historical, archaeological, and theological discourse.
• When referring to the council, it is often capitalized as the "Council of Chalcedon."
• It is distinct from the mineral "chalcedony," though they share an etymological root.

Noun

1. the fourth ecumenical council in 451 which defined the two natures (human and divine) of Christ
2. a former town on the Bosporus (now part of Istanbul); site of the Council of Chalcedon