Nivose Syllabification: (Ni·vose)Pronunciation: /nēˈvōz/ (also Nivôse)Definition of Nivose noun the fourth month of the French Republican calendar (1793–1805), originally running from December 21 to January 19. Origin:French Nivôse, from Latin nivosus 'snowy', from nix, niv- 'snow'Nivose in other Oxford dictionaries Definition of Nivose in the British & World English dictionary