ectoblast

American  

[ek-tuh-blast] / ˈɛk təˌblæst /

noun

Embryology.

1. the ectoderm.

2. epiblast.

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ectoblast British  

/ ˈɛktəʊˌblæst /

noun

1. another name for ectoderm epiblast

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Other Word Forms

• ectoblastic adjective

Etymology

Origin of ectoblast

First recorded in 1860–65; ecto- + -blast

Example Sentences

In the gastrula stage, the segmentation cavity in which the mesoblast is formed lies between the entoblast and ectoblast.

From The Gutenberg Webster's Unabridged Dictionary Section S by Project Gutenberg

This process goes on till all the cells are so filled by the mesoblast, with its myriad brood of cells, that the outer sac or ectoblast becomes a mere halo around it.

From The Atlantic Monthly, Volume 10, No. 61, November, 1862 by Various

The former is often also called the ectoblast, or epiblast, and the latter the endoblast, or hypoblast.

From The Evolution of Man — Volume 1 by Haeckel, Ernst Heinrich Philipp August