pluviose

from WordNet (r) 3.0 (2006)

Pluviose
    n 1: fifth month of the Revolutionary calendar (January and
         February); the rainy month

from The Collaborative International Dictionary of English v.0.48

Pluviose \Plu`vi`[^o]se"\, n. [F. See {Pluvious}.]
   The fifth month of the French republican calendar adopted in
   1793. It began January 20, and ended February 18. See
   {Vend['e]miaire}.
   [1913 Webster]