Webster's Revised Unabridged Dictionary · 1913

Pluvial

Pluvial , adjective

[Latin pluvialis, from pluvia rain: compare French pluvial. See Plover.]

1.
Of or pertaining to rain; rainy. [Rare]
2.
(Geology) Produced by the action of rain.

Pluvial , noun

[Late Latin pluviale a garment which keeps off the rain: compare French pluvial.]

A priest's cope.