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| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a chattering or flighty, light-headed person. |
"A diseased appetite ... prevails in several parts of Alabama, where they eat clay. I heard various speculations on the origin of this singular propensity, called 'geophagy' in some medical books." [Lyell, 1850]
geophagy ge·oph·a·gy (jē-ŏf'ə-jē) or ge·oph·a·gism (-jĭz'əm) or ge·o·pha·gia (jē'ə-fā'jə)
n.
The eating of earthy substances, such as clay or chalk, that is practiced as a custom or for dietary or subsistence reasons. Also called dirt-eating.