a Roman physician, whose praenomen is unknown, and who sometimes bears the agnomen Designatianus. He lived at Rome in the first century after Christ, and is said to have been physician to the emperor Claudius, and to have accompanied him in his expedition to Britain. He himself mentions Messalina, the wife " Dei nostri Caesaris" (c. 11.60, p. 203). He was a pupil of Tryplion (c. 44.175. p. 222) and Apuleius Celsus (100.22.94, p. 208c. 45.171, p. 221).
[W.A.G]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890