noun
a disorder characterized by the persistent eating of non-nutritive substances such as dirt or paper
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Pica is a disorder characterized by an appetite for substances that are largely non-nutritive, such as paper, clay, metal, chalk, soil, glass, or sand.
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I heard that she has pica and craves eating ice all the time.
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Some people joke that they have pica because they can't stop themselves from eating junk food.
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His obsession with collecting vintage records could be seen as a form of pica for music enthusiasts.