I. ˈplüvēəl adjective
Etymology: Latin pluvialis, from pluvia rain (from feminine of pluvius rainy, from pluere to rain) + -alis -al — more at flow
1. : of or relating to rain : characterized by abundant rain
2. of a geologic change : resulting from the action of rain or sometimes from the fluvial action of rainwater flowing in stream channels
II. noun
( -s )
Etymology: Medieval Latin pluviale ecclesiastic's cope, from Latin, neuter of pluvialis, adjective
1. archaic : an ecclesiastic's cope ; also : a monarch's robe of state of similar design
2.
[ pluvial (I) ]
: a prolonged period of wet climate in which the moisture relations of an affected area are profoundly altered (as by the formation of lakes or glaciers)