Discoloration

n.	1.	The act of discoloring, or the state of being discolored; alteration of hue or appearance.
	2.	A discolored spot; a stain.

Noun	1.	discoloration - a soiled or discolored appearance; "the wine left a dark stain" Synonyms: discolouration, stain
	2.	discoloration - the act of changing the natural color of something by making it duller or dingier or unnatural or faded Synonyms: discolouration

achromatization, birthmark, blanching, blaze, bleach, bleaching, blemish, blotch, brand, bruise, caste mark, check, checkmark, cicatrix, cut, dapple, decoloration, decolorization, decolorizing, discolor, discolorment, dot, earmark, engraving, etiolation, fading, fleck, flick, freckle, gash, graving, hack, jot, lentigo, lightening, macula, madder bleach, mark, market bleach, marking, mole, mottle, nevus, nick, notch, paling, patch, point, polka dot, prick, puncture, scar, scarification, score, scotch, scratch, scratching, speck, speckle, splash, splotch, spot, stain, stigma, strawberry mark, tattoo, tattoo mark, tick, tittle, watermark, whitening