ileum

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ileum:

see intestineintestine,
muscular hoselike portion of the gastrointestinal tract extending from the lower end of the stomach (pylorus) to the anal opening. In humans this fairly narrow (about 1 in./2.
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ileum

[′il·ē·əm]
(anatomy)
The last portion of the small intestine, extending from the jejunum to the large intestine.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

ileum

1. the part of the small intestine between the jejunum and the caecum
2. the corresponding part in insects
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005