Word Origin See more synonyms on Thesaurus.com noun, plural il·e·a . [ il-ee- uh] /ˈɪl i ə/ . Anatomy the third and lowest division of the small intestine, extending from the jejunum to the cecum. . Zoology the anterior portion of the hindgut of an insect or other arthropod. Origin of ileum 1675–85;
New Latin, Medieval Latin īleum,
(neuter plural) side of the body between hips and groin, guts, apparently by confusion with
Latin īleus ileus Related forms il·e·al, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for ilea Inner London Education Authority the part of the small intestine between the jejunum and the caecum the corresponding part in insects Word Origin
C17: New Latin, from Latin
īlium, īleum flank, groin, of obscure origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for ilea ileum n.
lowest part of the small intestine, 1680s, medical Latin, from
ileum, singular created from classical Latin plural ilia "groin, flank," in classical Latin, "belly, the abdomen below the ribs," poetically, "entrails, guts." Sense restriction and form apparently from confusion with Greek eileos (see ileus). Earlier in English ylioun (late 14c.), from Medieval Latin ileon. Related: Ileitis.
Online Etymology Dictionary, © 2010 Douglas Harper
ileum (ĭl ′ē-əm) 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.
The lower part of the small intestine, connecting the jejunum to the cecum of the large intestine. Related forms ileal adjective
The American Heritage® Science Dictionary
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