endothelium
noun
en·do·the·li·um
ˌen-də-ˈthē-lē-əm 
-dō-
plural endothelia
ˌen-də-ˈthē-lē-ə
-dō-
1
: an epithelium of mesodermal origin composed of a single layer of thin flattened cells that lines internal body cavities and the lumens of vessels
2
: the inner layer of the seed coat of some plants
Examples of endothelium in a Sentence
Recent Examples on the Web
Aging and menopause contribute to the dysfunction of the endothelium (cells of blood vessels).
—
Merve Ceylan, Health, 27 Dec. 2024
These complexes establish productive cellular infections in macrophages that result in the release of high concentrations of toxic NS1, a viral protein that damages cells' endothelium and produces dengue shock syndrome.
—Scientific American, 1 Jan. 2024
The corneal endothelium is a thin layer of cells that forms the inner lining of the cornea.
—William A. Haseltine, Forbes, 17 Feb. 2024
The innermost layer is known as the endothelial layer; exercise has been shown to influence the activity of the endothelium.
—Amber Sayer, Health, 25 Sep. 2023
Mamta Jain, $2.5 million for screening, treatment and prevention of Hepatocellular Cancer-Hepatitis C. Lance S. Terada, $1.05 million for autophagy and tumor endothelium.
—Dallas News, 16 Feb. 2023
The root of the problem is that even small amounts of the chemicals in cigarette smoke cause rapid inflammation in the endothelium, or lining, of blood vessels and in the lungs.
—Andrew Moseman, Discover Magazine, 10 Dec. 2010
Ramasamy and his researchers have found evidence of the virus remaining within the endothelial cells of penile tissue as much as seven months after infection, which suggests that direct damage to cavernosal endothelium may affect erectile function.
—Carolyn Barber, Fortune, 17 Aug. 2022
There is also a growing body of evidence suggesting that COVID affects the vascular endothelium, the inner lining of blood vessels, according to cardiologist Bernard Gersh, a professor of medicine at the Mayo Clinic College of Medicine and Science.
—Mariana Lenharo, Scientific American, 16 Mar. 2022
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Merve Ceylan, Health, 27 Dec. 2024
These complexes establish productive cellular infections in macrophages that result in the release of high concentrations of toxic NS1, a viral protein that damages cells' endothelium and produces dengue shock syndrome.
—Scientific American, 1 Jan. 2024
The corneal endothelium is a thin layer of cells that forms the inner lining of the cornea.
—William A. Haseltine, Forbes, 17 Feb. 2024
The innermost layer is known as the endothelial layer; exercise has been shown to influence the activity of the endothelium.
—Amber Sayer, Health, 25 Sep. 2023
Mamta Jain, $2.5 million for screening, treatment and prevention of Hepatocellular Cancer-Hepatitis C. Lance S. Terada, $1.05 million for autophagy and tumor endothelium.
—Dallas News, 16 Feb. 2023
The root of the problem is that even small amounts of the chemicals in cigarette smoke cause rapid inflammation in the endothelium, or lining, of blood vessels and in the lungs.
—Andrew Moseman, Discover Magazine, 10 Dec. 2010
Ramasamy and his researchers have found evidence of the virus remaining within the endothelial cells of penile tissue as much as seven months after infection, which suggests that direct damage to cavernosal endothelium may affect erectile function.
—Carolyn Barber, Fortune, 17 Aug. 2022
There is also a growing body of evidence suggesting that COVID affects the vascular endothelium, the inner lining of blood vessels, according to cardiologist Bernard Gersh, a professor of medicine at the Mayo Clinic College of Medicine and Science.
—Mariana Lenharo, Scientific American, 16 Mar. 2022
Cite this Entry
“Endothelium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endothelium. Accessed 29 May. 2025.
Copy CitationMedical Definition
endothelium
noun
en·do·the·li·um
ˌen-də-ˈthē-lē-əm
plural endothelia
-lē-ə
: an epithelium of mesoblastic origin composed of a single layer of thin flattened cells that lines internal body cavities (as the serous cavities or the interior of the heart)
Love words? Need even more definitions?
Merriam-Webster unabridged
Share