Meaning of epimyocardium

ep•i•my•o•car•di•um

Pronunciation: (ep"u-mī"u-kär'dē-um), [key]
— pl. -di•a
  1. the outer, mesodermal layer of the embryonic heart, which develops into the epicardium and the myocardium.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.