blastosphere

American  

[blas-tuh-sfeer] / ˈblæs təˌsfɪər /

noun

Embryology.

1. a blastula, especially a blastocyst.

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blastosphere British  

/ ˈblæstəʊˌsfɪə /

noun

1. another name for blastula

2. another name for blastocyst

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Etymology

Origin of blastosphere

blasto- + -sphere

Example Sentences

The cavity of the blastosphere, or segmentation cavity.

From Project Gutenberg

In the course of a series of divisions the eight cells come to form a hollow sphere—the blastosphere—enclosing a cavity known as the cleavage or segmentation cavity.

From Project Gutenberg

Such a sphere is called a blastosphere, and may be regarded as a spherical mass of protoplasm, of which the central portion is so much vacuolated that it seems to consist entirely of fluid.

From Project Gutenberg

The segmentation is complete; one side of the hollow blastosphere invaginates and forms a gastrula.

From Project Gutenberg

This is the blastosphere, shown diagrammatically in Figure 4, and of which an internal view, rather truer to the facts of the case as regards shape, is given as Figure 5.

From Project Gutenberg