discolouration has definitions from the field of color
1
[ noun ] a soiled or discolored appearance

Synonyms

stain discoloration

Examples

"the wine left a dark stain"

2
[ noun ] (color) the act of changing the natural color of something by making it duller or dingier or unnatural or faded

Synonyms

discoloration

Related terms

change_of_color discolor

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