The Collaborative International Dictionary of English v.0.48:

Peripateticism \Per`i*pa*tet"i*cism\, n. [Cf. F.
   p['e]ripat['e]tisme.]
   The doctrines or philosophical system of the peripatetics.
   See Peripatetic, n., 2. --Lond. Sat. Rev.
   [1913 Webster] Peripatopsis

WordNet (r) 3.0 (2006):

peripateticism
    n 1: (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" [syn: Aristotelianism, peripateticism]