1. 
   mesocardium
   <embryology> The double layer of splanchnic mesoderm supporting the embryonic heart in the pericardial cavity. It disappears before birth. ... Dorsal mesocardium, the part of the mesocardium dorsal to the embryonic heart; it breaks down to form the transverse sinus of the pericardium. ... Vent...
   Found op http://www.mondofacto.com/facts/dictionary?mesocardium
   
   
2. 
   mesocardium
   (mez″o-) (me″zo-kahr´de-әm) the part of the embryonic mesentery that connects the embryonic heart with the body wall in front and the foregut behind.
   Found op http://www.encyclo.co.uk/local/21001
   
   
3. 
   mesocardium
   mesocardium Epicardium covering the blood vessels which enter and leave the heart.
   Found op http://www.wordinfo.info/words/index/info/view_unit/1299/
   
   
4. 
   mesocardium
   Type: Term Pronunciation: mez′ō-kar′dē-ŭm, mez′ō-kar′dē-ă Definitions: 1. The double layer of splanchnic mesoderm supporting the embryonic heart in the pericardial cavity. It disappears before birth.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=54409
   
   

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