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

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

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

The outer layer of this double-walled sac is called the epiblast.

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