noun, plural ilea [il-ee-uh] .
Anatomy. the third and lowest division of the small intestine, extending from the jejunum to the cecum. See diag. under intestine.
Zoology. the anterior portion of the hindgut of an insect or other arthropod.

1675–85; < Neo-Latin, Medieval Latin īleum, variant of Latin īlia (neuter plural) side of the body between hips and groin, guts, apparently by confusion with Latin īleus ileus

ileal, adjective

ileum, ilium, Ilium. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
ileac or ileal (ˈɪlɪˌæk, ˈɪlɪəl)
1.  anatomy of or relating to the ileum
2.  pathol of or relating to ileus
ileal or ileal

ileum (ˈɪlɪəm)
1.  the part of the small intestine between the jejunum and the caecum
2.  the corresponding part in insects
[C17: New Latin, from Latin īlium, īleum flank, groin, of obscure origin]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

ileal il·e·al (ĭl'ē-əl)
Of or relating to the ileum.

ileum il·e·um (ĭl'ē-əm)
n. pl. il·e·a (-ē-ə)
The third and terminal portion of the small intestine, extending from the jejunum to the cecum.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
ileum   (ĭl'ē-əm)  Pronunciation Key 
Plural ilea
The lower part of the small intestine, connecting the jejunum to the cecum of the large intestine.

ileal adjective
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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