(From MAMS2): A Syrian Christian physician, known in Medieval Europe as Johannes Damascenus or Mesuë. He was son of a pharmacist. He studied in Baghdad with Jibrīl ibn Bakhtyashūʿ. He worked as the director of a hospital and court physician from the reign of Hārūn al-Rashīd to that of al-Mutawakkil. He wrote many works in Syriac and Arabic, as well as translated some Greek works. he was the teacher of Ḥunayn ibn Isḥāq al-ʿIbādī. He used dissection of apes in preparing his works.