Lewis Short
(adjective) : flŭvĭālis, e, fluvius
* Of or belonging to a river, river-, fluvial: undae,Verg. A. 9, 70; Ov. M. 1, 82: aqua,Col. 6, 22 fin.: harundo,Verg. G. 2, 414: harena,Pall. Oct. 17 fin.: lupus,a fish,Col. 8, 16, 4; v. lupus.
Charlton T. Lewis, Charles Short, A Latin Dictionary