endothelium

noun
en·​do·​the·​li·​um | \ ˌen-də-ˈthē-lē-əm How to pronounce endothelium (audio) , -dō- \
plural endothelia\ ˌen-​də-​ˈthē-​lē-​ə How to pronounce endothelium (audio) , -​dō-​ \

Definition of endothelium

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

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Other Words from endothelium

endothelial \ ˌen-​də-​ˈthē-​lē-​əl How to pronounce endothelium (audio) , -​dō-​ \ adjective

Examples of endothelium in a Sentence

Recent Examples on the Web Those reveal that the virus warps a critical piece of our vascular infrastructure: the single layer of cells lining the inside of every blood vessel, known as the endothelial cells or simply the endothelium. Will Stone Kaiser Health News, Star Tribune, "Is COVID a disease of the blood vessels?," 21 Nov. 2020 Medical experts believe that the virus is able to infect the endothelium, or the internal layer of blood vessels, and can catch a ride to any organ in the body. Carolyn Kormann, The New Yorker, "How Did I Catch the Coronavirus?," 7 Aug. 2020 Abnormalities in the endothelium, or inner lining, of these smaller vessels can cause spasms, resulting in pain and diminished blood flow to the heart. Roni Caryn Rabin, New York Times, "Is Microvascular Heart Disease a Serious Condition?," 29 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'endothelium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of endothelium

1872, in the meaning defined at sense 1

History and Etymology for endothelium

New Latin, from end- + -thelium (as in epithelium)

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Time Traveler for endothelium

Time Traveler

The first known use of endothelium was in 1872

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Statistics for endothelium

Cite this Entry

“Endothelium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endothelium. Accessed 12 May. 2021.

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More Definitions for endothelium

endothelium

noun
en·​do·​the·​li·​um | \ ˌen-də-ˈthē-lē-əm How to pronounce endothelium (audio) \
plural endothelia\ -​lē-​ə How to pronounce endothelium (audio) \

Medical Definition of endothelium

: 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)

More from Merriam-Webster on endothelium

Britannica.com: Encyclopedia article about endothelium

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