[ 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.

Origin of epiblast

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

Related forms

ep·i·blas·tic, adjective
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Examples from the Web for epiblast

British Dictionary definitions for epiblast


/ (ˈɛpɪˌblæst) /


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

Derived Forms

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

Medicine definitions for epiblast


[ ĕpə-blăst′ ]


The outer layer of a blastula that gives rise to the ectoderm after gastrulation.

Related forms

ep′i•blastic adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.