Lewis Short
Flūmentāna | porta (noun F) : (), flumen
* A gate of Rome near the Tiber; River-gate, at the entrance to the Campus Martius: Flumentana porta Romae appellata, quod Tiberis partem ea fluxisse affirmant, Paul. ex Fest. p. 89 Müll.; Varr. R. R. 3, 2, 6; Liv. 35, 9, 3; 35, 21, 5; Inscr. Fratr. Arv. p. 254 ed. Marin.; cf. Becker's Antiq. 1, p. 155 sq.
* Transf.: nescis cur, cum portam Flumentanam Caelius occuparit, ego Puteolos non meos faciam,i. e. a villa near the River-gate,Cic. Att. 7, 3, 9.
Charlton T. Lewis, Charles Short, A Latin Dictionary