EXAMPLES | WORD ORIGIN noun, plural ep·i·the·li·ums, ep·i·the·li·a . [ep- uh- thee-lee- uh] /ˌɛp əˈθi li ə/ . 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 of epithelium 1740–50;
Greek epi- epi-
) teat +
New Latin -ium -ium Related forms ep·i·the·li·al, adjective in·ter·ep·i·the·li·al, adjective non·ep·i·the·li·al, adjective sub·ep·i·the·li·al, adjective un·ep·i·the·li·al, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for epithelium Historical Examples of epithelium British Dictionary definitions for epithelium noun plural -liums or -lia ( -lɪə) an animal tissue consisting of one or more layers of closely packed cells covering the external and internal surfaces of the body. The cells vary in structure according to their function, which may be protective, secretory, or absorptive Derived Forms epithelial, adjective Word Origin for epithelium
C18: New Latin, from
epi- + Greek thēlē nipple
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for epithelium n.
1748, Modern Latin (Frederick Ruysch), from Greek
epi "upon" (see epi-) + thele "teat, nipple" (see fecund). Related: Epithelial.
Online Etymology Dictionary, © 2010 Douglas Harper
epithelium [ĕp′ə-thē ′lē-əm] n. pl. 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. Related forms 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.
Plural epithelia The thin, membranous tissue that lines most of the internal and external surfaces of an animal's body. Epithelium is composed of one or more layers of densely packed cells. In vertebrates, it lines the outer layer of the skin (epidermis), the surface of most body cavities, and the lumen of fluid-filled organs, such as the gut or intestine. Related forms epithelial adjective
The American Heritage® Science Dictionary
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