This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Consumption of clay, chalk or dirt.

n. eating earth, clay, chalk; occurs in some primitive tribes, sometimes in cases of nutritional deficiency or obsessive behavior

"I thought that was an irrelevant example, because people don't normally eat tobacco and tobacco use is such a recent invention in human history that I can't see how it could have anything to do with the origin of geophagia that is said to have been practiced in ancient Sumeria."

pica   

chthonophagy    chthonophagia    geophagy   

Georgia   

pica