Ibn Sidah

Abū’l-Ḥasan ʻAlī ibn Ismāʻīl (), known as Ibn Sīdah (), or Ibn Sīdah'l-Mursī (), (c.1007-1066), was a linguist, philologist and lexicographer of Classical Arabic from Andalusia. He compiled the encyclopedia ' () (Book of Customs) and the Arabic-language dictionary Al-Muḥkam wa-al-muḥīt al-aʻẓam () ("the great and comprehensive arbiter"). His contributions to language, literature, and logic were considerable.

Ibn Sīdah was born in Murcia in eastern Andalusia. The historian Khalaf ibn ʻAbd al-Malik Ibn Bashkuwāl () (1183-1101) in his book ' () (Book of Relations) gives Ismāʻīl as the name of his father, in agreement with name given in the Mukhassas. However Al-Fath ibn Khaqan in mathmah al-anfus () has the name Aḥmad. Yaqut al-Hamawi in The Lexicon of Literature, says Ibn Sīdah ('son of a woman') was his nickname. Remarkably both he and his father were blind. His father was a sculptor although it seems the disciplines he devoted his life to, philology and lexicography, had been in his family.

Mohammed ibn Ahmed ibn Uthman Al-Dhahabi's biographic encyclopedia ' () (Lives of The Noble Scholars) is the main biographic source. He lived in the taifa principality of "Dénia and the Eastern Islands" () under the rule of Emir Mujahid al-Amiri al-Muwaffaq () (1044-1014) and he travelled to Mecca and Medina. He studied in Cordova under the renowned grammarian Abu al-Sa'ad ibn al-Hasan al-Rubai al-Baghdadi (أبو العلاء صاعد بن الحسن الربعي البغدادي) (d.417AH/1026AD) exiled in Andalusia, and with Abu Omar al-Talmanki (أبي عمر الطلمنكي) (429-340AH). He died in Dénia.