GNU Collaborative International Dictionary of English

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Found 2 definitions

  1.       
    
    Ileum , n. [L. ile, ileum, ilium, pl. ilia, groin, flank.]
    1. (Anat.) The last, and usually the longest, division of the small intestine; the part between the jejunum and large intestine. [Written also ileon, and ilium.]
      1913 Webster
    2. (Anat.) See Ilium. [R.]
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      ☞ Most modern writers restrict ileum to the division of the intestine and ilium to the pelvic bone.

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  2.       
    
    Ilium , n. [See Ileum.] (Anat.) The dorsal one of the three principal bones comprising either lateral half of the pelvis; the dorsal or upper part of the hip bone. See Innominate bone, under Innominate. [Written also ilion, and ileum.]
    1913 Webster

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