Definition of endothelium in English:

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Pronunciation: /ˌɛndə(ʊ)ˈθiːlɪəm/


[mass noun] Anatomy
The tissue which forms a single layer of cells lining various organs and cavities of the body, especially the blood vessels, heart, and lymphatic vessels. It is formed from the embryonic mesoderm. Compare with epithelium.
Example sentences
  • Laughter appears to cause the tissue that forms the inner lining of blood vessels, the endothelium, to dilate or expand in order to increase blood flow.
  • This endothelium helps give vessels the elasticity needed to regulate blood pressure.
  • The endothelium is a layer of cells that line the undersurface of the cornea and are essential to keeping the cornea clear.



Example sentences
  • They consist of thin sheets of collagen and smooth muscle with an endothelial covering.
  • Pulmonary endothelial cells serve as gatekeepers to trafficking inflammatory and immune cells.
  • The staining was predominantly located in endothelial and perivascular cells within the tumors.


Late 19th century: modern Latin, from endo- 'within' + Greek thēlē 'nipple'.

For editors and proofreaders

Line breaks: endo|the¦lium

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