The definition can be broadened to encompass any behavior manifested by the eating of a non-food that is unusual in kind or quantity (2) including ice (pagophagia), hair, plaster, clay or dirt (geophagia), laundry and corn starch (
amylophagia), ashes, and cigarette butts.
Several examples of pica include
amylophagia (the consumption of starch), coprophagia (feces), geophagia (soil, clay, or chalk), hyalophagia (glass), pagophagia (pathological consumption of ice), trichophagia (hair or wool), urophagia (urine) and xylophagia (wood).
In another 4 patients a combination of pica and food craving was found: ice and cheese in 1 patient, ice and tomatoes (tomatophagia) in 1, ice, matches (cautopyreiophagia) and brown bread (
amylophagia) in 1, and ice and cucumber in 1.
Patients with kidney disease practicing pica most commonly consume clay or dirt (geophagia), laundry starch (
amylophagia), or ice (pagophagia), but the list of potential pica substances can be quite extensive.