Niveous is a 7 letter English word. It's valid Scrabble word worth 10 points. It's valid Words with friends word worth 13 points.
You can make 136 anagrams from letters in niveous (einosuv).
1615-25; Latin niveus snowy, snow-white, of, from snow, equivalent to niv- (stem of nix) snow + -eus -eous
So Cinaber becomes red by the acide exhalation of sulphur, which otherwise presents a pure and niveous white.