Geophage refers to an organism that feeds on earth or soil. Some synonyms for geophage include geophagus, earth eater, humus eater, dirt feeder, and soil muncher. The term geophagy describes the practice of eating earth, which is common among some animals and humans. A geophage may consume soil for various reasons, including to supplement their diet with essential minerals, to aid digestion, or to alleviate nutritional deficiencies. Geophagy has also been observed in pregnant women, where it is believed to alleviate morning sickness, as well as in animals such as birds, elephants, and primates. Overall, geophagy and geophages play an essential role in the ecosystem, helping to decompose organic matter and distribute nutrients throughout the soil.