The Collaborative International Dictionary of English v.0.48:

Patristic \Pa*tris"tic\, Patristical \Pa*tris"tic*al\, a. [F.
   patristique. See Paternal.]
   Of or pertaining to the Fathers of the Christian church.
   [1913 Webster]

         The voluminous editor of Jerome and of tons of
         patristic theology.                      --I. Taylor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

patristic
    adj 1: of or relating to the writings of the early church
           fathers [syn: patristic, patristical]