a PHYSICIAN, called by Galen ὁ ῥιζοτόμος, "the herbalist," who must have lived in or before the second century after Christ. His medical formulae are several times quoted by Galen (De Compos. Medicam. sec. Locos, 2.1, vol. xii. p. 557; De Compos. Medicam. sec. Gen. 6.15, vol. xiii. p. 935), and he is perhaps the same person who is called φαρμακοπώλης, " the druggist." (De Compos. Medicam. sec. Locos, 9.4, vol. xiii. p. 281.) Possibly they may both be identical with Antonius Castor [CASTOR, ANTONIUS], but of this there is no proof whatever. A treatise on the Pulse (Opera, vol. xix. p. 629), which goes under Galen's name, but which is probably a spurious compilation from his other works on this subject, is addressed to a person named Antonius, who is there called Φιλομαθὴς καὶ Φιλόσοφος; and Galen wrote his work De Propriorum Animi cujusdam Affectuum Dignotione et Curatione (Opera, vol. v. p. 1, &c.) in answer to a somewhat similar treatise by an Epicurean philosopher of this name, who, however, does not appear to have been a physician.