(redirected from epiblasts)
Also found in: Medical, Encyclopedia.


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

ep′i·blas′tic adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Physiology) embryol the outermost layer of an embryo, which becomes the ectoderm at gastrulation. Also called: ectoblast
ˌepiˈblastic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈɛp əˌblæst)

the primordial outer layer of a young embryo.
ep`i•blas′tic, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Its expression hasbeen reported in ESC, embryonic carcinoma cells, and embryonic germ cells, as well as interior cells of compacted morula and epiblasts (Mitsui et al., 2003).
The germ cell marker gene Oct-4 was reported expressing in pluripotent cells of morula, inner cell mass, epiblasts (Lengner et al., 2008), primordial germ cells (Encinas et al., 2012), hematopoietic and mesenchymal progenitor cells (Lengner et al., 2008).
That genus has formula F + FP (i.e., embryo mesocotyl internode negligible, epiblast present, scutellar tail absent, embryonic leaf margins overlapping), a pattern typical of Oryzeae, not unknown in Pooideae, and unrecorded within the PACC clade.