[ mez-uh-kahr-dee-uh m, mes-, mee-zuh-, -suh- ]
/ ˌmɛz əˈkɑr di əm, ˌmɛs-, ˌmi zə-, -sə- /

noun, plural mes·o·car·di·a [mez-uh-kahr-dee-uh, mes-, mee-zuh-, -suh-] /ˌmɛz əˈkɑr di ə, ˌmɛs-, ˌmi zə-, -sə-/. Embryology.

the double layer of splanchnic mesoderm supporting the embryonic heart.

Origin of mesocardium Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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Medical definitions for mesocardium

[ mĕz′ə-kärdē-əm ]

n. pl. mes•o•car•di•a (-dē-ə)

Either of the two layers of the embryonic mesentery supporting the embryonic heart in the pericardial cavity.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.