dis·col·or·ation /(ˌ)dɪsˌkʌləˈreʃən/
變色;汙點
Dis·col·or·a·tion n.
1. The act of discoloring, or the state of being discolored; alteration of hue or appearance.
2. A discolored spot; a stain.
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discoloration
n 1: a soiled or discolored appearance; "the wine left a dark
stain" [syn: stain, discolouration]
2: the act of changing the natural color of something by making
it duller or dingier or unnatural or faded [syn: discolouration]