myo·​car·​di·​um | \ ˌmī-ə-ˈkär-dē-əm How to pronounce myocardium (audio) \

Definition of myocardium

: the middle muscular layer of the heart wall

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Other Words from myocardium

myocardial \ ˌmī-​ə-​ˈkär-​dē-​əl How to pronounce myocardium (audio) \ adjective

Examples of myocardium in a Sentence

Recent Examples on the Web Myocarditis is inflammation of the myocardium, the muscles in the heart, according to Medline Plus. Korin Miller,, 26 Apr. 2021 Hemorrhagic softening of the myocardium, liver, kidneys and spleen. Dawn Mitchell, Indianapolis Star, 2 Aug. 2019

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

First Known Use of myocardium

1879, in the meaning defined above

History and Etymology for myocardium

New Latin, from my- + Greek kardia heart — more at heart

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Time Traveler for myocardium

Time Traveler

The first known use of myocardium was in 1879

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Statistics for myocardium

Last Updated

7 May 2021

Cite this Entry

“Myocardium.” Dictionary, Merriam-Webster, Accessed 12 Jun. 2021.

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More Definitions for myocardium


myo·​car·​di·​um | \ ˌmī-ə-ˈkärd-ē-əm How to pronounce myocardium (audio) \
plural myocardia\ -​ē-​ə How to pronounce myocardium (audio) \

Medical Definition of myocardium

: the middle muscular layer of the heart wall

More from Merriam-Webster on myocardium

Britannica English: Translation of myocardium for Arabic Speakers Encyclopedia article about myocardium


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