blastosphere

[ blas-tuh-sfeer ]

noun

, Embryology.

1. a blastula, especially a blastocyst.

blastosphere

/ ˈblæstəʊˌsfɪə /

noun

1. another name for blastula
2. another name for blastocyst

Word History and Origins

Origin of blastosphere¹

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

If we compare this with the typical blastosphere of the lower type, we see that it is, as it were, flattened out on the yolk.

From Project Gutenberg