Lewis Short
(adjective) : rīpensis, e, id.
* Situated or stationed on a river's bank (post-class.): Dacia,on the bank of the Danube,Amm. 26, 7, 12: milites, = riparienses, Cod. Th. 7, 20, 4; hence, militia,id. ib. 22, 8.
Charlton T. Lewis, Charles Short, A Latin Dictionary