epiblast

noun Embryology.

1. 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.

noun

1. embryol the outermost layer of an embryo, which becomes the ectoderm at gastrulationAlso called: ectoblast

n.

1. The outer layer of a blastula that gives rise to the ectoderm after gastrulation.