n. 心外膜

[医] 心外膜, 心包脏层

[ noun ]
the innermost of the two layers of the pericardium
<noun.body>

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.