mesendoderm
/mɛˈsɛndə(ʊ)dəːm/ /mɪˈsɛndə(ʊ)dəːm/Embryology
noun
Mesenchyme that is derived from endoderm rather than from mesoderm. Also: the inner layer of blastoderm before its differentiation into endoderm and mesoderm.
Origin
Late 19th century; earliest use found in Journal of the Royal Microscopical Society. From meso- + endoderm, after German Mesentoderm mesentoderm.