Lewis Short
(adjective) : amphĭthĕātrālis, e, amphitheatrum
* Of or pertaining to the amphitheatre, amphitheatrical: spectaculum,Plin. 11, 24, 28, § 84: magistri,Mart. 11, 70: pompa,Claud. Cons. Mall. Theod. 293.
Charlton T. Lewis, Charles Short, A Latin Dictionary