Medical Dictionary

geophagy

noun ge·oph·a·gy \-ə-jē-\
plural ge·oph·a·gies

Definition of GEOPHAGY

:  the practice of eating earthy substances (as clay) that in humans is performed especially to augment a scanty or mineral-deficient diet or as part of a cultural tradition—called also earth eating; compare pica
March 31, 2015
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