mesocardium
noun
me·so·car·di·um
-ˈkärd-ē-əm 
1
: the transitory mesentery of the embryonic heart
2
: either of two tubular prolongations of the epicardium that enclose the aorta and pulmonary trunk and the venae cavae and pulmonary veins
Cite this Entry
“Mesocardium.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/mesocardium. Accessed 25 Oct. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share