plu·vi·ous (plvē-əs) also plu·vi·ose (-ōs′)
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 the Appendix of Indo-European roots.]
plu′vi·osi·ty (-ŏsĭ-tē) n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.