Lewis Short
(adjective) : Singăra, ōrum, n.
* A city of Mesopotamia, the capital of the Arabes Praetavi, Plin. 5, 24, 21, § 86.—Hence, : Singărē-nus, a, um, of or belonging to Singara: congressiones, Sext. Ruf. Brev. 27.
Charlton T. Lewis, Charles Short, A Latin Dictionary