matriarchal

from WordNet (r) 3.0 (2006)

matriarchal
    adj 1: characteristic of a matriarchy [ant: {patriarchal}]

from The Collaborative International Dictionary of English v.0.48

matriarchal \ma`tri*ar"chal\, a.
   Of or pertaining to a matriarch; governed by a matriarch or
   matriarchs; as, a matriarchal society.
   [1913 Webster +PJC]

from Moby Thesaurus II by Grady Ward, 1.0

37 Moby Thesaurus words for "matriarchal":
      absolute, aristocratic, authoritarian, autocratic, autonomous,
      bureaucratic, civic, civil, constitutional, democratic, despotic,
      dictatorial, fascist, federal, federalist, federalistic,
      governmental, gubernatorial, heteronomous, matriarchic, monarchal,
      monarchial, monarchic, monocratic, official, oligarchal,
      oligarchic, parliamentarian, parliamentary, patriarchal,
      patriarchic, pluralistic, political, republican, self-governing,
      theocratic, totalitarian