discolor definition by Webster's New World
Origin: Middle English discolouren ; from Old French descolourer ; from Midieval Latin discolorare ; from Classical Latin discolor, of another color: see dis- and amp; color
discolor definition by American Heritage Dictionary
verb dis·col·ored, dis·col·or·ing, dis·col·ors verb, transitive
Origin: Middle English discolouren, from Old French discolerer : des-, dis- + colourer, to color (from Latin colōrāre, from color, color; see color).