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endocardium

American  
[en-doh-kahr-dee-uhm] / ˌɛn doʊˈkɑr di əm /

noun

Anatomy.

plural

endocardia

  1. the serous membrane that lines the cavities of the heart.

endocardium British  
/ ˌɛndəʊˈkɑːdɪəm /

noun

  1. the membrane that lines the cavities of the heart and forms part of the valves

"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

Etymology

Origin of endocardium

First recorded in 1870–75; endo- + -cardium

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The endothelial tunic is continuous with the endocardium of the heart.

From Textbooks • Jun. 9, 2022

The inner wall of the heart has a lining called the endocardium.

From Textbooks • Jun. 9, 2022

The walls of the heart are composed of an outer epicardium, a thick myocardium, and an inner lining layer of endocardium.

From Textbooks • Jun. 19, 2013

The septa are physical extensions of the myocardium lined with endocardium.

From Textbooks • Jun. 19, 2013

They firmly adhere to the endocardium, and when detached from it give it a torn appearance.

From Special Report on Diseases of the Horse by Michener, Charles B.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.