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From Chalcedonian + Christianity. The adjective refers to the Council of Chalcedon (451 CE), held at Chalcedon.
Etymology from Wiktionary, CC BY-SA 4.0.
Chalcedonian Christianity
Today it means: A form of Christianity that accepts the doctrinal definitions of the Council of Chalcedon, including the teaching that Jesus Christ has two natures (divine and human) united in one person. Full definition →