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Epithelial

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ep⋅i⋅the⋅li⋅um

[ep-uh-thee-lee-uhm]
–noun, plural -li⋅ums, -li⋅a [-lee-uh] . Biology.
any animal tissue that covers a surface, or lines a cavity or the like, and that, in addition, performs any of various secretory, transporting, or regulatory functions.

Origin:
1740–50; < NL < Gk epi- epi- + thēl() teat + NL -ium -ium


ep⋅i⋅the⋅li⋅al, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ep·i·the·li·um   (ěp'ə-thē'lē-əm)   
n.   pl. ep·i·the·li·ums or ep·i·the·li·a (-lē-ə)
Membranous tissue composed of one or more layers of cells separated by very little intercellular substance and forming the covering of most internal and external surfaces of the body and its organs.

[New Latin epithēlium : epi- + Greek thēlē, nipple; see dhē(i)- in Indo-European roots.]
ep'i·the'li·al adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: ep·i·the·li·al
Pronunciation: "ep-&-'thE-lE-&l
Function: adjective
: of or relating to epithelium<epithelial cells>

Main Entry: ep·i·the·li·um
Pronunciation: "ep-&-'thE-lE-&m
Function: noun
Inflected Form: plural ep·i·the·lia /-lE-&/
: a membranous cellular tissue that covers a free surface or lines a tube or cavity of an animal body and serves especiallyto enclose and protect the other parts of the body, to produce secretions and excretions, and to function in assimilation
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

epithelium ep·i·the·li·um (ěp'ə-thē'lē-əm)
n. pl. ep·i·the·li·ums or ep·i·the·li·a (-lē-ə)
Membranous tissue composed of one or more layers of cells separated by very little intercellular substance and forming the covering of most internal and external surfaces of the body and its organs.


ep'i·the'li·al adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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