an ancient Greek orator and philosopher, a native of Paphlagonia, who flourished in the 4th century. He had great interest and favour with the emperors in his time, and though a heathen, was of a very tolerating spirit. He taught for many years at Constantinople, of which city he was made prefect by Julian and Theodosius; and lived to a great age. More than 30 of his orations are still extant, beside commentaries on several parts of Aristotle's works.