Source : Webster's Revised Unabridged Dictionary (1913)

Amphitheatric \Am`phi*the*at"ric\, Amphitheatrical
\Am`phi*the*at"ric*al\, a. [L. amphitheatricus.]
   Of, pertaining to, exhibited in, or resembling, an
   amphitheater.

Source : WordNet®

amphitheatrical
     adj : of or related to an amphitheater [syn: {amphitheatric}]