You searched for: “geophagy
geophagous, geophage, geophagy
1. Feeding on soil; deriving nutrients from soil or the sediment.
2. Ingestion of earthy substances like clay; as a result of starvation, lack of something in the diet, or possibly as a result of mental illness.

A page about a pica eating More details about geophagy.

geophagy (s) (noun), geophagies (pl)
Eating clay, consuming soil, or ingesting dirt.
This entry is located in the following units: Allotriophagy (page 1) geo-, ge- + (page 16)
A unit related to: “geophagy
(eating dirt or earth is a common practice on a global scale)