Pica (/ˈpaɪkə/ pIE-kuh)[1] is a psychological disorder characterized by an appetite for substances that are largely non-nutritive.[2] The substance may be biological such as hair (trichophagia) or feces (coprophagia), natural such as ice (pagophagia) or dirt (geophagia), and otherwise chemical or manmade (as listed below). The term originates from the latin word pica (“magpie”), from the concept that magpies will eat almost anything[3].