endoderm

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en·do·derm / ˈendəˌdərm/ (also en·to·derm) • n. Zoology & Embryology the innermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the lining of the gut and associated structures. Compare with ectoderm and mesoderm.DERIVATIVES: en·do·der·mal adj.en·do·der·mic adj.

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