P0386700 (plo͞o′vē-əs) also plu·vi·ose(-ōs′)adj. Characterized by heavy rainfall; rainy.[Middle English, from Old French pluvieus, from Latin pluviōsus, from (aqua) pluvia, rain (water), feminine of pluvius, of rain, from pluere, to rain; see pleu- in Indo-European roots.]plu′vi·os′i·ty(-ŏs′ĭ-tē) n.