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epiblast

American

[ep-uh-blast] / ˈɛp əˌblæst /

noun

Embryology.

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.

epiblast British

/ ˈɛpɪˌblæst /

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

epiblastic

adjective

Etymology

Origin of epiblast

First recorded in 1865–70; epi- + -blast

Example Sentences

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See Examples For:

epiblast

To this end, they developed a novel embryo-like model system consisting of a layer of epiblast and a layer of VE cells -- a cup without a lid.

From Science Daily ● Jun. 18, 2024

The epiblast emits Nodal, while the lid, the extraembryonic endoderm, releases the counterpart BMP.

From Science Daily ● Jun. 18, 2024

Control cells clustered according to lineage and are indicated with the coloured bars: red, primitive endoderm; green, epiblast; and blue, trophectoderm.

From Nature ● Sep. 19, 2017

Transcriptomics analysis revealed that, in POU5F1-null cells, gene expression was downregulated not only for extra-embryonic trophectoderm genes, such as CDX2, but also for regulators of the pluripotent epiblast, including NANOG.

From Nature ● Sep. 19, 2017

The remainder of the epiblast constitutes the epidermis.

From Text Book of Biology, Part 1: Vertebrata by Wells, H. G. (Herbert George)

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023