Lewis Short
(adjective) : plŭvĭālis, e, pluvia
* Of or belonging to rain, rainy, rain-: Auster,rainbringing,Verg. G. 3, 429: Haedi,id. A. 9, 668: sidus,Ov. M. 3, 594: fungi,which are produced by rain,id. ib. 7, 393: aqua,rainwater,Sen. Q. N. 3, 7, 4: dies,Col. 2, 13: imbres,Tac. H. 5, 23.
Charlton T. Lewis, Charles Short, A Latin Dictionary