An embryonic blastomere that has not yet differentiated into mesoderm and endoderm(noun)
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Use "endomesoderm" in a sentence
"Figure 9.3 is an illustration of the genetic regulatory system that turns on the genes that control the construction of a tissue called the endomesoderm in sea urchins."
"FIGURE 9.3 Schematic drawing of a developmental gene regulatory network for sea urchin endomesoderm."
"Kernels in general can be expected to have a degree of complexity similar to that for sea urchin endomesoderm, so we can infer that other kernels also were designed."