
1) Outer layer of the heart wall 2) Serosa 3) Serous membrane 4) Visceral pericardium
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https://www.crosswordclues.com/clue/epicardium

Epicardium describes the outer layer of heart tissue (from Greek; epi- outer, cardium heart). When considered as a part of the pericardium, it is the inner layer, or visceral pericardium, continuous with the serous layer. Its largest constituent is connective tissue and functions as a protective layer. The visceral pericardium apparently produces ...
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http://en.wikipedia.org/wiki/Epicardium

• (n.) That of the pericardium which forms the outer surface of the heart; the cardiac pericardium.
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http://thinkexist.com/dictionary/meaning/epicardium/

(from the article `human cardiovascular system`) ...The portion of membrane lining the fibrous pericardium is known as the parietal serous layer (parietal pericardium), that covering the heart as ... The wall of the heart consists of three distinct layersthe epicardium (outer layer), the myocardium (middle layer), and the endocard...
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http://www.britannica.com/eb/a-z/e/36

The inner lining of the serous pericardium lying directly on the heart, forming the outermost layer of the heart wall. ... (27 Sep 1997) ...
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http://www.encyclo.co.uk/local/20973

(ep″ĭ-kahr´de-әm) the inner layer of the serous pericardium, which is in contact with the heart.
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http://www.encyclo.co.uk/local/21001

First larval stage of the isopod suborder Epicaridea; attaches to a free-living copepod.
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http://www.encyclo.co.uk/visitor-contributions.php
Ep`i·car'di·um noun [ New Latin , from Greek
'epi` upon +
kardi`a heart.]
(Anat.) That part of the pericardium which forms the outer surface of the heart; the cardiac pericardium.
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http://www.encyclo.co.uk/webster/E/53

Type: Term Pronunciation: ep′i-kar′dē-ŭm Synonyms: visceral layer of serous pericardium
Found on
http://www.medilexicon.com/medicaldictionary.php?t=29662

Epicardium: The inner layer of the pericardium, a conical sac of fibrous tissue that surrounds the heart and the roots of the great blood vessels. The pericardium has outer and inner coats. The outer coat is tough and thickened, loosely cloaks the heart, and is attached to the central part of the diaphragm and the back of the sternum (breastbone). ...
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http://www.medterms.com/script/main/art.asp?articlekey=9134

(ep;u1-kar;de-um) A thin, outer layer of the heart; also called the visceral pericardium.
Found on
http://www.mhhe.com/biosci/abio/glossary.mhtml

The outermost membrane of the surface of the heart
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http://www.thehorse.com/Glossary.xhtml?L=E

[
n] - the innermost of the two layers of the pericardium
Found on
http://www.webdictionary.co.uk/definition.php?query=epicardium
visceral pericardium noun the innermost of the two layers of the pericardium
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https://www.encyclo.co.uk/local/20974

Greek epi = upon, and kardia = heart, hence, the visceral layer of serous pericardium which covers the heart.
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https://www.encyclo.co.uk/local/21450

the inner serous layer of the pericardium, lying directly upon the heart.
Found on
https://www.infoplease.com/dictionary/epicardium

the outermost aspect of the heart.
Found on
https://www.stanfordchildrens.org/en/topic/default?id=glossary---cardiovasc

The thin membrane covering the outside surface of the heart muscle.
Found on
https://www.texasheart.org/heart-health/heart-information-center/topics/a-z
No exact match found.