EPIBLAST
- the ectoderm (the outermost germ layer of an embryo) [n EPIBLASTS]
- the external layer of an embryo, also ECTODERM, EXODERM [n -S]
- the primordial outer layer of a young embryo before the segregation of the germ layers, capable of becoming the ectoderm and containing cells capable of becoming the mesoderm and endoderm
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