Abu Sahl 'Isa ibn Yahya al-Masihi al-Jurjani () was a Christian Persian physician, from Gorgan, east of the Caspian Sea, in Iran. He was the teacher of Avicenna. He wrote an encyclopedic treatise on medicine of one hundred chapters (al-mā'a fi-l-sanā'a al-tabi'iyyah; ), which is one of the earliest Arabic works of its kind and may have been in some respects the model of Avicenna's Qanun. He wrote other treatises on measles, on the plague, on the pulse, etc. He died in a dust storm in the deserts of Khwarezmia in 1010. References Sources Carl Brockelmann: Arabische Litteratur (vol. 1, 138, 1898). G. Karmi, A mediaeval compendium of Arabic medicine: Abu Sahl al-Masihi's "Book of the Hundred.", J. Hist. Arabic Sci. vol. 2(2) 270-90 (1978). Further reading See also List of Iranian scientists People from Gorgan 10th-century Iranian physicians Members of the Assyrian Church of the East Botanists of the medieval Islamic world Iranian Christians