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 (dī′ə-klē′shən) Originally Gaius Aurelius Valerius Diocletianus. ad 245?-313?
Emperor of Rome (284-305) who divided the empire into east and west (286) in an attempt to rule the territory more effectively. His desire to revive the old religion of Rome led to the last major persecution of the Christians (303).


(Biography) full name Gaius Aurelius Valerius Diocletianus. 245–313 ad, Roman emperor (284–305), who divided the empire into four administrative units (293) and instigated the last severe persecution of the Christians (303)


(ˌdaɪ əˈkli ʃən)

(Gaius Aurelius Valerius Diocletianus), A.D. 245–316, emperor of Rome 284–305.
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Noun1.Diocletian - Roman Emperor who when faced with military problems decided in 286 to divide the Roman Empire between himself in the east and Maximian in the west; he initiated the last persecution of the Christians in 303 (245-313)
References in periodicals archive ?
305: Emperor Gaius Aurelius Valerius Diocletianus Jovius of Rome resigns.
GAIUS AURELIUS Valerius Diocletianus was sixty years old or so, had been Roman emperor for twenty years and had had enough.