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hy′po·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.


1. (Zoology) embryol Also called: endoblast the inner layer of an embryo at an early stage of development that becomes the endoderm at gastrulation
2. (Zoology) a less common name for endoderm
ˌhypoˈblastic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈhaɪ pəˌblæst)

1. the endoderm of an embryo.
2. the cells entering into the inner layer of a young gastrula, capable of becoming endoderm and, to some extent, mesoderm.
hy`po•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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hypoblast - the inner germ layer that develops into the lining of the digestive and respiratory systems
germ layer - (embryology) any of the 3 layers of cells differentiated in embryos following gastrulation
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The human embryo, in the gastrulation stage, has the shape of a flat disc with two layers of cells (bilaminar disk) known as epiblast and hypoblast (Figure 1) [40].
Antin, "Induction of cardiac myogenesis in avian pregastrula epiblast: the role of the hypoblast and activin," Development, vol.
This gland is only a part of the lymphoid tissue derived from the hypoblast. Developmentally, tonsils arise from the ventral portion of the second pharyngeal pouch, i.e.
The first is the ICM, which subsequently develops into the epiblast and hypoblast; the epiblast forms the fetus.