Wiktionary
chalcedonian
n. One who accepts the definition given at the http://en.wikipedia.org/wiki/Council%20of%20Chalcedon (451 AD) of how the divine and human relate in the person of Jesus Christ.
Usage examples of "chalcedonian".
The Chalcedonians versus the Monophysites versus the Dyophysites versus the Nestorians, to mention only four.