septem-flŭus, a, um, adj. [fluo],
sevenfold-flowing , an Ovidian epithet of the Nile (as having seven mouths): Nilus, Ov. M. 1, 422: flumina Nili, id. ib. 15, 753 (cf. the foll. art. and septemplex).
septemfluus adj. septem+FLV-, sevenfoldflowing, with seven mouths : Nilus, O.: flumina ...
An Elementary Latin Dictionary