Noun
The act of discoloring, or the state of being discolored; alteration of hue or appearance.
Source: Webster's dictionaryI used to have terrible acne on my face: red, splotchy discoloration. And mucus - I was constantly blowing my nose. Then one day, this woman sits down next to me on a bus, and says, 'You're lactose-intolerant.' It all cleared up in three days. That changed my life. Doctors couldn't figure it out. Woody Harrelson
the wine left a dark stain Source: Internet
Abnormal discoloration of wood often denotes a diseased condition, indicating unsoundness. Source: Internet
A laboratory test was thus performed to determine whether iron or chloride ions might have produced the purple discoloration observed in the product. Source: Internet
If beeswax is heated above 85 °C (185 °F) discoloration occurs. Source: Internet
Eventually, the chlorine will dull the surface and cause discoloration and pitting. Source: Internet