Alhacen
n 1: an Egyptian polymath (born in Iraq) whose research in
geometry and optics was influential into the 17th century;
established experiments as the norm of proof in physics
(died in 1040) [syn: {Alhazen}, {Alhacen}, {al-Haytham},
{Ibn al-Haytham}, {Al-Hasan ibn al-Haytham}]