Term Name:	spleen primordium
Synonyms:	left spleen primordium, spleen mesenchyme, splenic mesenchyme, splenic primordium
Definition:	A dense syncitial-like mesenchymal thickening in the dorsal mesogastrium[ISBN]. the embryonic connective tissue made up of loosely aggregated mesenchymal cells, supported by interlaminar jelly, that gives rise to the developing spleen[MP].
Ontology:	Cell Ontology [UBERON:0006293]