NUM: 272 MOT: HAYYAN, JABIR IBN.- CD : N DEF: (2e/8e S). (né en 730). Geber de l'Occident. Elève de Imam Jafar Sadiq. Illustre alchimiste et auteur de 3000 traités dont la "Balance des lettres". Paul Kraus* WORD: HAYYAN, JABIR IBN.- CD : N DEF: (2nd/8th Century). (born in 730 AD). Called Geber in the West. Was the pupil of Imam Jafar Sadiq. Famous alchinist and author of 3,000 works including the "Balance of Letters" sv. Paul Kraus.*