- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for epiblast
Ectoblast: the outer wall of a cell; the ectoderm or epiblast.Explanation of Terms Used in Entomology
John. B. Smith
The outer of these is the epiblast, the inner the mesoblast.
The division of the epiblast into a nervous and epidermic stratum.
The inner of the two is called the hypoblast, the outer the epiblast.
The mesoblast is attached in the median line to the epiblast.
- embryol the outermost layer of an embryo, which becomes the ectoderm at gastrulationAlso called: ectoblast
- The outer layer of a blastula that gives rise to the ectoderm after gastrulation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.