ileum

/ˈɪliəm/
noun
  1. The third and final part of the small intestine, connecting the jejunum to the large intestine.
    • Doctors examined the ileum during the colonoscopy to check for inflammation.
    • The ileum absorbs vitamin B12 and bile salts from digested food.
    • After surgery, part of her ileum was removed to treat the blockage.