Definify.com
Webster 1913 Edition
Pluvial
1.
Of or pertaining to rain; rainy.
[R.]
2.
(Geol.)
Produced by the action of rain.
Plu′vi-al
,Noun.
[LL.
pluviale
a garment which keeps off the rain: cf. F. pluvial
.] A priest’s cope.