Cassianus, Joannus, an Eastern ascetic; came to Constantinople, and became a pupil of Chrysostom, who ordained him; founded two monasteries in Marseilles; opposed the extreme views of Augustine in regard to grace and free-will, and human depravity; and not being able to go the length of Pelaganism, adopted semi-Pelagianism, q.v. (360‒448).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Cassell, John * Cassini