Definition of myocardium in English:
 myocardium
noun ˌmʌɪə(ʊ)ˈkɑːdɪəmˌmaɪəˈkɑrdiəm
mass nounAnatomy The muscular tissue of the heart.
 Example sentencesExamples
-  Moreover, the right ventricular free wall showed extensive replacement of the myocardium by adipose tissue.
 -  In addition, the right coronary artery occasionally supplies a sizeable portion of left ventricular myocardium.
 -  However, the liver, myocardium, and lung also showed this feature.
 -  The journey from the bone marrow to vascular endothelium or myocardium is divided into stages.
 -  In contrast, stem cell therapy adds new myocardium to replace infarcted muscle.
 
Origin
  
Late 19th century: modern Latin, from myo- 'muscle' + Greek kardia 'heart'.
   Definition of myocardium in US English:
 myocardium
nounˌmaɪəˈkɑrdiəmˌmīəˈkärdēəm
Anatomy The muscular tissue of the heart.
 Example sentencesExamples
-  In contrast, stem cell therapy adds new myocardium to replace infarcted muscle.
 -  Moreover, the right ventricular free wall showed extensive replacement of the myocardium by adipose tissue.
 -  The journey from the bone marrow to vascular endothelium or myocardium is divided into stages.
 -  However, the liver, myocardium, and lung also showed this feature.
 -  In addition, the right coronary artery occasionally supplies a sizeable portion of left ventricular myocardium.
 
Origin
  
Late 19th century: modern Latin, from myo- ‘muscle’ + Greek kardia ‘heart’.