Meaning of mesocardium

mes•o•car•di•um

Pronunciation: (mez"u-kär'dē-um, mes"-, mē"zu-, -su-), [key]
— pl. -di•a
  1. the double layer of splanchnic mesoderm supporting the embryonic heart.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.