Abu Nasr Isma'il ibn Hammad al-Jawhari (ابو نصرإسماعيل بن حماد الجوهري) also spelled al-Jauhari (died 1002 or 1008) was a medieval Turkic[1][2] lexicographer and the author of a notable Arabic dictionary al-Ṣiḥāḥ fī al-Lughah (الصحاح في اللغة).
He was born in the city of Farab[3] (Otrar) in Transoxiana (in today's southern Kazakhstan).
He began his studies of the Arabic language in Farab,[3] then studied in Baghdad, continuing among the Arabs of the Hejaz,[4] then moving to northern Khurāsān, first to Damghan before settling finally at Nishapur.
[3] It was here he met his death in a failed attempt at flight from the roof of a mosque, possibly due to delusions of being a bird.
[5] In 1729 Ibrahim Muteferrika's Arabic-Turkish dictionary, based on Jawhari's, became the first book printed by printing press of Ottoman era.