Source : Webster's Revised Unabridged Dictionary (1913)

Pluvial \Plu"vi*al\, a. [L. pluvialis, fr. pluvia rain: cf. F.
   pluvial. See {Plover}.]
   1. Of or pertaining to rain; rainy. [R.]

   2. (Geol.) Produced by the action of rain.

Pluvial \Plu"vi*al\, n. [LL. pluviale a garment which keeps off
   the rain: cf. F. pluvial.]
   A priest's cope.

Source : WordNet®

pluvial
     adj : marked by rain; "their vacation turned out to be a series of
           rainy days" [syn: {rainy}, {pluvious}]