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Overview page. Subjects: Biological Sciences.

A stone swallowed (e.g. by some reptiles and birds) to break up food and so assist digestion. Such stones acquire a rounding and polish.

See overview in Oxford Index


Overview page. Subjects: Medicine and Health.

n. hairball: a mass of swallowed hair in the stomach. It may be the patient’s own hair or animal hairs. see bezoar.

See overview in Oxford Index