The doctrines of the Nestorian Christians, or of Nestorius.
Residing in Christ are two separate natures and two separate persons, one divine and one human.
The theological doctrine, declared heretical in 431, that within Jesus are two distinct persons, divine and human, rather than a single divine person.
the theological doctrine (named after Nestorius) that Christ is both the son of God and the man Jesus (which is opposed to Roman Catholic doctrine that Christ is fully God)
The Christology of Nestorius (Patriarch of Constantinople, 428-431). Nestorius held that Christ had two complete natures - human and divine. He taught that one could not call Mary the "Mother of God" because she was the mother of the human nature only. The Council of Ephesus in 431 condemned Nestorius for dividing Christ into two persons, but Nestorius denied the charge. Possibly, he taught that the two natures of Christ were united morally or in purpose only rather than essentially or physically. However, many historians conclude that Nestorius actually taught two natures in one person, but became the victim of misunderstanding and opposition because he emphasized the distinctions between the two natures and refused to call Mary the mother of God.
The teaching of Nestorius that the human and divine natures of Christ were somehow separate and distinct, where orthodox theology maintained that Jesus was both fully human and fully divine in an essential union
Nestorianism is the Christian doctrine that Jesus exists as two persons, the man Jesus and the divine Son of God, or Logos, rather than as a unified person. This doctrine is identified with Nestorius (c. 386–c. 451), Patriarch of Constantinople. This view of Christ was condemned at the Council of Ephesus in 431, and the conflict over this view led to the Nestorian schism, separating the Assyrian Church of the East from the Byzantine Church.