Lewis Short
(adjective) : imbrĭcus, a, um, imber
* Rainy (ante- and post-class.): Auster,rain-bringing,Plaut. Merc. 5, 2, 35: solstitium (opp. hiems serena),Macr. S. 5, 20, 14: imbrica tempestate pluviam videtur significare, Paul. ex Fest. p. 109 Müll.
Charlton T. Lewis, Charles Short, A Latin Dictionary