What is "epicardium"

Epicardium \Ep`i*car"di*um\, n. [NL., fr. Gr. 'epi` upon + kardi`a heart.] (Anat.) That part of the pericardium which forms the outer surface of the heart; the cardiac pericardium.

n. (context anatomy English) The layer of tissue between the pericardium and the heart.

1. n. the innermost of the two layers of the pericardium [syn: visceral pericardium]

2. [also: epicardia (pl)]