Lewis Short
(adjective) : flūmĭnĕus, a, um, id.
* Of, in, or belonging to a river, river- (poet.): aqua,Ov. F. 2, 46; cf. undae,id. M. 14, 599; 15, 565: ulva,id. ib. 5, 519: ulmus,Stat. Th. 9, 266: alnus,Sil. 3, 458: cygnus,Ov. H. 8, 67; cf. volucres,id. M. 2, 253: classis,used for crossing a river,Sil. 4, 494.
Charlton T. Lewis, Charles Short, A Latin Dictionary