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Noun: discoloration  dis,kú-lu'rey-shun
  1. A soiled or discoloured appearance
    "the wine left a dark discoloration";
    - stain, discolouration [Brit, Cdn]
  2. The act of changing the natural colour of something by making it duller, dingier, unnatural or faded
    - discolouration [Brit, Cdn]

Derived forms: discolorations

Type of: appearance, change of color [US], change of colour [Brit, Cdn], visual aspect