abu ali al-husain ibn abdallah ibn sina
- n Arabian physician and influential Islamic philosopher; his interpretation of Aristotle influenced St. Thomas Aquinas; writings on medicine were important for almost 500 years (980-1037)
abu dhabi
- n a sheikhdom of eastern Arabia and capital of the United Arab Emirates
abu hafs al-masri brigades
- n a terrorist group that has worked with Al Qaeda; claimed responsibility for attacks in Iraq and Turkey