oligarchical

from WordNet (r) 3.0 (2006)

oligarchical
    adj 1: of or relating to or supporting or characteristic of an
           oligarchy [syn: {oligarchic}, {oligarchical}]

from The Collaborative International Dictionary of English v.0.48

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.).
   [1913 Webster]