1) Revolutionary calendar month 2) The rainy month 
Pluviôse (plyvjoz; also Pluviose) was the fifth month in the French Republican Calendar. The month was named after the Latin word pluviosus, which means rainy. Pluviôse was the second month of the winter quarter (mois d`hiver). It started between 20 and 22 January. It ended between 18 and 20 February. It follows the Nivôse and precedes the Ven....
rainy
• (n.) The fifth month of the French republican calendar adopted in 1793. It began January 20, and ended February 18. See Vendemiaire.
Plu`vi`ôse' noun [ French See Pluvious .] The fifth month of the French republican calendar adopted in 1793. It began January 20, and ended February 18. See Vendémiaire . 
[n] - fifth month of the Revolutionary calendar (January and February)
noun fifth month of the Revolutionary calendar (January and February); the rainy month