[ en-doh-thee-lee-uh m ]
/ ˌɛn doʊˈθi li əm /

noun, plural en·do·the·li·a [en-doh-thee-lee-uh] /ˌɛn doʊˈθi li ə/.

a type of epithelium composed of a single layer of smooth, thin cells that lines the heart, blood vessels, lymphatics, and serous cavities.

Nearby words

  1. endothelial dystrophy of cornea,
  2. endothelial myeloma,
  3. endothelioid,
  4. endothelioma,
  5. endotheliosis,
  6. endotherm,
  7. endothermic,
  8. endothoracic fascia,
  9. endothrix,
  10. endotoxemia

Origin of endothelium

1870–75; endo- + New Latin -thelium; cf. epithelium

Related formsen·do·the·li·al, adjectivesub·en·do·the·li·al, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for endothelium

British Dictionary definitions for endothelium


/ (ˌɛndəʊˈθiːlɪəm) /

noun plural -lia (-lɪə)

a tissue consisting of a single layer of cells that lines the blood and lymph vessels, heart, and some other cavities
Derived Formsendothelial, adjectiveendothelioid, adjective

Word Origin for endothelium

C19: New Latin, from endo- + -thelium, from Greek thēlē nipple

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for endothelium


[ ĕn′dō-thēlē-əm ]

n. pl. en•do•the•li•a (-lē-ə)

A thin layer of flat epithelial cells that lines serous cavities, lymph vessels, and blood vessels.
Related formsen′do•theli•al adj.

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

Science definitions for endothelium


[ ĕn′dō-thēlē-əm ]

Plural endothelia

A thin layer of flat epithelial cells that lines the lymph vessels, blood vessels, and the inner cavities of the heart. Compare mesothelium.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.