Lewis Short
Mūgĭōnĭa | Mūgōnĭa, is | Mūgĭōnis | Mucionis (noun F) : or , , or (), , (porta)
* A gate of ancient Rome, which was afterwards within the city: in Palatio Mucionis a mugitu,Varr. L. L. 5, § 164 Müll.: Mugionia porta Romae dicta est a Mugio quodam. Paul. ex Fest. p. 144 Müll.; Sol. 1, 24; cf. Becker's Antiq. 1, p. 109 sq.
Charlton T. Lewis, Charles Short, A Latin Dictionary