Lewis Short
(adjective) : mētrŏpŏlītānus, a, um, 1. metropolis
* Of or belonging to a metropolis, metropolitan (post-class.): nomen,Cod. Just. 11, 21, 1.—Esp. subst.: Mētrŏ-pŏlītānus, i, m., a metropolitan, the bishop of a metropolitan church, Sid. Ep. 7, 9.
Charlton T. Lewis, Charles Short, A Latin Dictionary