Definition of geophagy in English:
 geophagy
noun dʒɪˈɒfədʒidʒiˈɑfədʒi
mass nounThe practice in some tribal societies of eating earth.
 Example sentencesExamples
-  The following quotation serves both to illustrate his main point, that geophagy has been widespread, and to exhibit the pleasant style in which he wrote.
 -  Mineral supplementation is usually postulated as the purpose of this behavior, and most geophagy by G. agassizii is on calcium-rich substrates by adult females.
 -  Howler monkeys are well known to engage in geophagy, or earth eating, though the reason they do it remains unclear.
 -  It may explain, for example, occurrence of geophagy in parrots, which consume large quantities of secondary metabolites in fruits and seeds.
 -  For many years, parrots and macaws had been observed on the river banks in the Amazonian forests of Peru biting off and swallowing chunks of orange clay - a practice known as geophagy.
 
Origin
  
Mid 19th century: from geo- 'earth' + Greek phagia 'eating, feeding' (from phagein 'eat').