Theodosian

adjective
The·​o·​do·​sian | \ ¦thēə¦dōsh(ē)ən\

Definition of Theodosian

 (Entry 1 of 2)

1 [ Theodosius I †395 a.d. Roman emperor + English -an, adjective suffix ] : of or relating to Theodosius the Great under whom the Roman state undertook to enforce Christianity and orthodoxy
2 [ Theodosius II †450 a.d. Eastern Roman emperor + English -an, adjective suffix ] : of or relating to Theodosius II or the Theodosian Code promulgated during his reign codifying imperial constitutions issued since the reign of Constantine I and including laws banning paganism and penalizing heresy

Theodosian

noun
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plural -s

Definition of Theodosian (Entry 2 of 2)

1 [ Theodosius †about 538 a.d. patriarch of Alexandria + English -an, noun suffix ] : a follower of Theodosius of Alexandria the leader of the Monophysites in the 6th century
2 [ Theodosius, 16th century Russian monk + English -an, noun suffix ] : a follower of the Russian monk Theodosius who preached in Lithuania in 1525 against idolatry and founded a sect practicing prayer for purification of articles acquired from unbelievers