epiblast /epi·blast/ (ep´ĭ-blast)
epiblast
1. the upper layer of the bilaminar embryonic disc present during the second week; it gives rise to ectoderm.
2. ectoderm.
3. ectoderm, except for the neural plate.epiblas´tic
ep·i·blast ( p  -bl st )n. The outer layer of a blastula that gives rise to the ectoderm after gastrulation. ep i·blastic adj. |
epiblast
[ep′iblast′]
Etymology: Gk, epi, upon, blastos, germ
the primordial outer layer of the blastocyst or blastula, before differentiation of the germ layers, that gives rise to the ectoderm and contains cells capable of forming the endoderm and mesoderm. See also ectoderm. epiblastic, adj.
epiblast
layer of cells roofing over the blastocoel in the avian embryo.
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