Monophysitism

Definition: a Christian heresy of the 5th and 6th centuries that challenged the orthodox definition of the two natures (human and divine) in Jesus and instead believed there was a single divine nature

Definition: A Christian belief which holds that the human nature of Jesus Christ was essentially absorbed by the divine, and thus that he essentially had but one nature, contrary to the orthodox view that Christ has two natures, both fully human and fully divine. A variant is apollonarianism, which has gnostic overtones and used hellenistic ideas alien to orthodox Christianity.