averroist

from The Century Dictionary.

• noun A follower of Averrhoës, a celebrated Arabian philosopher and commentator on Aristotle, who was born at Cordova about A. D. 1126, and died 1198.

from the GNU version of the Collaborative International Dictionary of English.

• noun One of a sect of peripatetic philosophers, who appeared in Italy before the restoration of learning; so denominated from Averroes, or Averrhoes, a celebrated Arabian philosopher. He held the doctrine of monopsychism.