Xenocrates (Greek: Ξενοκράτης; fl. 1st century) a Greek physician of Aphrodisias in Cilicia,^[1] who must have lived about the middle of the 1st century, as he was probably a contemporary of Andromachus the Younger.^[2] Galen says that he lived in the second generation before himself.^[3] He wrote some pharmaceutical works, and is blamed by Galen^[3] for making use of disgusting remedies, for instance, human brains, flesh, liver, bone ash, urine, excrement, etc. One of his works was entitled On Useful Things from Living Beings (Greek: Περὶ τῆς ἀπὸ τῶν Ζώων Ὠφελείας).^[4] He is several times quoted by Galen, and also by Clement of Alexandria;^[5] Artemidorus;^[6] Pliny;^[7] Oribasius;^[8] Aëtius;^[9] and Alexander of Tralles.^[10] Besides some short fragments of his writings there is extant a synopsis of a work on marine creatures, (Greek: Περὶ τῆς ἀπὸ τῶν Ἐνύδρων Τροφῆς) preserved by Oribasius.