|  Chalcedon 
 
 1. a former town on the Bosporus (now part of Istanbul);
 site of the Council of Chalcedon
 • Syn:
 Kadikoy
 • Instance Hypernyms:
 town
 • Part Holonyms:
 Istanbul, Stambul, Stamboul, Constantinople
 2. the fourth ecumenical council in 451 which defined the two natures (human and divine) of Christ
 • Syn:
 Council of Chalcedon
 • Hypernyms:
 ecumenical council
 
 
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