discoloration
n.a change in the color of something, often making it look dirty or damaged. You might see this on old paper, skin, or wood that has been left in the sun.
n.a change in the natural color of a surface or substance, typically resulting in a dull, dark, or uneven appearance. Often used in medical, forensic, or industrial contexts to describe physical degradation.
“The old map shows brown discoloration from water damage.”
“The doctor noted a slight discoloration on the patient's arm, which suggested a minor bruise from the fall.”
“Prolonged exposure to ultraviolet light can cause significant discoloration in synthetic fabrics, leading to a faded and brittle appearance that compromises the garment's structural integrity.”
“It causes a skin discoloration that appears pink on light skin but gray or violet on darker skin.”
From discolor + -ation.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.