The Collaborative International Dictionary
Mesogastrium
Mesogastrium \Mes`o*gas"tri*um\, n. [NL. See Mesogaster.] (Anat.)
The umbilical region.
The mesogaster.
Wiktionary
mesogastrium
n. (context anatomy English) The part of the embryonic mesentery that includes the stomach
Usage examples of "mesogastrium".
According to the review of this article, Toldt explains the case by assuming that other parts of the celomic epithelium, besides that of the mesogastrium, are capable of forming splenic tissue.