noun, plural myocardia [mahy-uh-kahr-dee-uh] . Anatomy.
the muscular substance of the heart.

1875–80; myo- + -cardium

myocardial, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
myocardial (ˌmaɪəʊˈkɑːdɪəl)
of or relating to the muscular tissue of the heart

myocardium (ˌmaɪəʊˈkɑːdɪəm)
n , pl -dia
the muscular tissue of the heart
[C19: myo- + cardium, from Greek kardia heart]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1866, from myo-, comb. form of Gk. mys (gen. myos) "muscle" (see muscle) + kardia "heart" (see heart). Related: Myocardial.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

myocardium my·o·car·di·um (mī'ō-kär'dē-əm)
n. pl. my·o·car·di·a (-dē-ə)
The middle layer of the heart, consisting of cardiac muscle.

my'o·car'di·al adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Influenza would sure receive more consideration today regarding myocardial infarction triggering.
The researchers then excised the vascularized patches and transplanted them onto the hearts of rats with myocardial infarctions.
ST segment elevation acute myocardial infarction and complications of myocardial infarction.
Adenosine has been proved to be an important mediator of myocardial protection induced by ischemic preconditioning.
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