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Pica is an appetite for non-nutritive substances (e.g., coal, soil, chalk, paper etc.) or an abnormal appetite for some things that may be considered foods, such as food ingredients (e.g., flour, raw potato, starch). In order for these actions to be considered pica, they must persist for more than one month, at an age where eating such objects is considered developmentally inappropriate. The condition's name comes from the Latin word for the magpie, a bird which is reputed to eat almost anything. Pica is seen in all ages, particularly in pregnant women and small children, especially among children who are developmentally disabled, where it is the most common eating disorder.