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Ibn al-Haytham

(Encyclopedia)Ibn al-Haytham ălhəzĕnˈ [key], 965–c.1040, Arab mathematician. Ibn al-Haytham was born in Basra, but made his career in Cairo, where he supported himself copying scientific manuscripts. Among hi...

Alhazen

(Encyclopedia)Alhazen: see Ibn al-Haytham.

Witelo of Silesia

(Encyclopedia)Witelo of Silesia or Vitelo, c.1230–75, Silesian physicist, philosopher, and theologian. He studied in Paris and Padua and spent time at the papal palace in Viterbo, Italy. His ten-volume work on op...

Ibn Bajja

(Encyclopedia)Ibn Bajja: see Avempace.

Ibn Batuta

(Encyclopedia)Ibn Batuta ĭˈbən bäto͞oˈtä [key], 1304?–1378?, Muslim traveler, b. Tangier. No other medieval traveler is known to have journeyed so extensively. In 30 years (from c.1325) he made a series of...

Ibn Khaldun

(Encyclopedia)Ibn Khaldun ĭˈbən khäldo͞onˈ [key], 1332–1406, Arab historian, b. Tunis. He held various offices under the rulers of Tunis and Morocco and served (1363) as ambassador of the Moorish king of Gr...

Ibn Khalikan

(Encyclopedia)Ibn Khalikan ĭbn khăˈlēkăn [key] or Ahmad bin Muhammad al-Barmaki al-Irbili ash-Shafii, 1211–82, Arabic biographer, b. in Erbil, Iraq. Ibn Khallikan lived and served as a judge and scholar in M...

Ibn Rushd

(Encyclopedia)Ibn Rushd: see Averroës.

Ibn Saud

(Encyclopedia)Ibn Saud (Abd al-Aziz ibn Saud) ĭˈbən säo͞odˈ [key], c.1880–1953, founder of Saudi Arabia and its first king. His family, with its regular seat at Riyadh in the Nejd, were the traditional lead...

Ibn Sina

(Encyclopedia)Ibn Sina: see Avicenna.