rhetor and theologian. A native of Africa, he taught in Rome. He became a Christian, resigned his rhetorship in 362 (an event which excited comment and influenced St Augustine), and wrote theological works against the Arians. The obscurity of his writing is largely due to the fact that he was translating philosophical Greek into Latin in an attempt to utilize a form of 4th-cent. Neoplatonic metaphysics to elucidate and defend the Nicene doctrine of the Trinity.