Source : Webster's Revised Unabridged Dictionary (1913)

Oligarchic \Ol`i*gar"chic\, Oligarchical \Ol`i*gar"chic*al\, a.
   [Gr. ?: cf. F. oligarchique. See {Oligarchy}.]
   Of or pertaining to oligarchy, or government by a few.
   ``Oligarchical exiles.'' --Jowett (Thucyd. ).

Source : WordNet®

oligarchical
     adj : of or relating to or supporting or characteristic of an
           oligarchy [syn: {oligarchic}]