A stone or hard mass that forms inside the intestines, similar to kidney stones but occurring in the digestive tract.
Greek 'enteron' (intestine) + 'lithos' (stone). This combining form '-lith' appears in many medical terms like 'gallstone' and 'kidney stone'.
Intestinal stones are rare in humans but absolutely common in horses—and they can get massive, sometimes requiring surgery to remove bowling-ball-sized stones from the intestines.
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