Chalcedon

from WordNet (r) 3.0 (2006)
Chalcedon
    n 1: a former town on the Bosporus (now part of Istanbul); site
         of the Council of Chalcedon [syn: {Chalcedon}, {Kadikoy}]
    2: the fourth ecumenical council in 451 which defined the two
       natures (human and divine) of Christ [syn: {Chalcedon},
       {Council of Chalcedon}]
    

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