Lewis Short
(adjective) : Trans-tĭbĕrīnus, a, um
* That is beyond the Tiber, Transtiberine: ambulator,Mart. 1, 42, 3. — Subst.: Transtĭ-bĕrīni, ōrum, m., those dwelling beyond the Tiber, Cic. Att. 12, 23, 3.
Charlton T. Lewis, Charles Short, A Latin Dictionary