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Noun, pl. epicardia

1. Describes the outer layer of heart tissue. When considered as a part of the pericardium, it is the inner layer, or visceral pericardium, continuous with the serous layer. (

2. A serous membrane that forms the innermost layer of the pericardium and the outer surface of the heart. (Google Dictionary)

3. The innermost of the two layers of the pericardium. (

Word origin: From Greek; epi- outer, cardium heart.

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