discoloration
dis.col.or.ation \(.)dis-.k*l-*-'ra--sh*n\ n 1: the act of discoloring : the state of being discolored 2: STAIN
Webster's English Dictionarydis.col.or.ation \(.)dis-.k*l-*-'ra--sh*n\ n 1: the act of discoloring : the state of being discolored 2: STAIN