epiblast

American  

[ep-uh-blast] / ˈɛp əˌblæst /

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.

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epiblast British  

/ ˈɛpɪˌblæst /

noun

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

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Other Word Forms

• epiblastic adjective

Etymology

Origin of epiblast

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

Example Sentences

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

With this unprecedented clarity, the team directly observed two key moments in gastrulation: the first epiblast symmetry-breaking event and the emergence of the molecular markers of the primitive streak and mesoderm upon in vitro attachment.

From Science Daily • Mar. 23, 2024

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

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

M, The Malpighian or renal caecal diverticula of Scorpio. pro, The proctodaeum or portion of gut leading to anus and formed embryologically by an inversion of the epiblast at that orifice.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3 "Apollodorus" to "Aral" by Various