discolouration
dis-col-our-a-tion
noun
The process or result of changing to an abnormal or undesirable colour.
"The old photograph showed signs of discolouration."
Thesaurus
Synonyms: discoloration, stain
dis-col-our-a-tion
The process or result of changing to an abnormal or undesirable colour.
"The old photograph showed signs of discolouration."
Synonyms: discoloration, stain