epiblast

[ ep-uh-blast ]

/ ˈɛp əˌblæst /

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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.

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Origin of epiblast

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

OTHER WORDS FROM epiblast

ep·i·blas·tic, adjective

Words nearby epiblast

Ephrata, epi-, epibenthos, epibiosis, epibiotic, epiblast, epiblem, epiboly, epic, epically, epicalyx

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use epiblast in a sentence

The cells of the epiblast, up to the thirteenth hour, have chiefly undergone change in becoming smaller.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
The epiblast spreads rapidly over the white yolk, and the area pellucida also increases in size.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
There is considerable variation in size in the cells in different parts of the epiblast.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
At the sides of the head the cells are larger than anywhere else in the epiblast, being here about 1/1000th inch in diameter.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour

The mesoblast cells are in contact with both hypoblast and epiblast, and appear to be fused with the latter.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour

British Dictionary definitions for epiblast

epiblast

/ (ˈɛpɪˌblæst) /

noun

embryol the outermost layer of an embryo, which becomes the ectoderm at gastrulationAlso called: ectoblast

Derived forms of epiblast

epiblastic, adjective

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