Pica

Pica: A craving for something not normally regarded as nutritive. For example, dirt. Pica is a classic clue to iron deficiency in children. It also occurs in zinc deficiency. Pica is also seen as a symptom in several neurobiological disorders, including autism and Tourette's syndrome, and is sometimes seen during pregnancy.

Pica is a Latin term for magpie, a bird that gleans all sorts of things for its nest.