ectoblast

[ek-tuh-blast]

noun

Embryology.

1. the ectoderm.

2. epiblast.

ectoblast

/ ˈɛktəʊˌblæst /

noun

1. another name for ectoderm epiblast

Other Word Forms

• ectoblastic adjective

Word History and Origins

Origin of ectoblast¹

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

Example Sentences

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.

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

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

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