Source : Webster's Revised Unabridged Dictionary (1913)

Aristotelianism \Ar`is*to*te"li*an*ism\
   The philosophy of Aristotle, otherwise called the Peripatetic
   philosophy.

Source : WordNet®

Aristotelianism
     n : (philosophy) the philosophy of Aristotle that deals with
         logic and metaphysics and ethics and poetics and politics
         and natural science; "Aristotelianism profoundly
         influenced Western thought"