yrus, an ancient Christian writer, in the fourth century, deacon of Edessa, was born at Nisibe in Syria. He was greatly esteemed by Basil, Gregory Nazianzen, and other eminent men. He wrote against the opinions of Sabellius, Arius, Apollinaris, and the Marcians, and acquired such reputation that he was styled the doctor and the prophet of the Syrians. He died in the year 378. The best editions of his works are, that of Oxford, in 1708, in folio; and that of Rome, from 1732 to 1738, in Syriac, Greek, and Latin, six vols. folio.