Source : Webster's Revised Unabridged Dictionary (1913)

Philological \Phil`o*log"ic*al\, Philologic \Phil`o*log"ic\, a.
   [Cf. F. philologique.]
   Of or pertaining to philology. -- {Phil`o*log"ic*al*ly}, adv.

Source : WordNet®

philological
     adj : of or relating to or dealing with philology