amphictyonic

from The Collaborative International Dictionary of English v.0.48

Amphictyonic \Am*phic`ty*on"ic\, a. [Gr. ?.]
   Of or pertaining to the Amphictyons or their League or
   Council; as, an Amphictyonic town or state; the Amphictyonic
   body. --W. Smith.
   [1913 Webster]