Yusuf al-Khuri (Arabic:يوسف الخوري), also known asYusuf al-Khuri al-Qass (d. 912), was a Christian priest, physician, mathematician, and translator of theAbbasid era.
He was one of the five most prominent translators and scholars hired by theBanu Musa brothers along withHunayn ibn Ishaq,Thabit Ibn Qurra,Qusta Ibn Luqa andAl Himsi.[1] The Banu Musa brothers were mathematicians and patrons of theHouse of Wisdom in Baghdad who financed missions to find ancient manuscripts in foreign lands and have them translated.
After the death of the Banu Musa, he formed part of the school of translators founded and led by Thabit Ibn Qurra which produced Arabic versions of some of the mathematical classics:Euclid,Archimedes,Apollonios,Theodosios,Ptolemy.[2]
Among his translated works areArchimedes’ lost work on triangles andThe Quadrature of the Parabola (Quadratura parabolae) with the title Kitab al-Muthallathat fromSyriac into Arabic,[citation needed] which was afterwards revised by Thabit Ibn Qurra. He also translatedGalen's “De simplicium medicamentorum temperamentis ac facultatibus”, which was afterwards revised by Hunayn ibn Ishaq.[3]