Abū˒l‐Fadā˒il Ismā˓īl ibn al‐ḥusayn al‐Jurjānī, Zayn al‐Dīn, sometimes called Sayyid Ismā˓īl, was the most eminent Persian physician after Ibn Sīnā (Avicenna), and the author of the first great medical compilation written in Persian. Born at Jurjan, 50‐mile east of modern Gurgan, east of the Caspian, he was a pupil of Ibn Abī ṣādiq (d. 1066–1077), who had himself been a pupil of Ibn Sīnā. In 1110 al‐Jurjānī entered the service of the ruler of Khwarizm (modern Khiva), the Khwārizmshāh Quṭb al‐Dīn Muhammad (d. 1127) and his son Atsiz; later he moved to Marw (Merv) and served the rival sultan Sanjar. Al‐Jurjānī died at Marw in about 1136 (AH 531).
Al‐Jurjānī's great work is entitled Dhakhīra‐i‐Khwārazmshāhī (The Thesaurus of the King of Kharazm). Comparable in size and scope to Avicenna's Canon, the Thesaurusis a compendium of medical knowledge and clinical practice. It rapidly became a classic and established the medical and scientific vocabulary in Persian; its influence was extensive...
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