Definition of epiblast in English:

epiblast

Syllabification: ep·i·blast
Pronunciation: /ˈepəˌblast
 
/

noun

Embryology
The outermost layer of an embryo before it differentiates into ectoderm and mesoderm.

Definition of epiblast in:

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Word of the day ween
Pronunciation: wēn
verb
be of the opinion; think or suppose