Definitions for "Epiblast"
The outer layer of the blastoderm; the ectoderm. See Blastoderm, Delamination.
In the chick embryo, following delamination which separates the blastoderm into two layers, the epiblast is the upper layer of cells that contains the presumptive ectoderm, mesoderm and some endoderm. It is separated from the lower hypoblast.
The outer layer of a blastula that gives rise to the ectoderm after gastrulation.