blastosphere

[ blas-tuh-sfeer ]

/ ˈblæs təˌsfɪər /

a blastula, especially a blastocyst.

Origin of blastosphere

A limit is set to increase in the size of a blastosphere by the nature of the material of its walls.

The Biological Problem of To-day |Oscar Hertwig
There is a regular segmentation resulting in the formation of a blastosphere with a central segmentation cavity.

The Works of Francis Maitland Balfour, Volume II (of 4) |Francis Maitland Balfour
The segmentation is uniform, and a blastosphere, formed of a single layer of columnar cells, is the product of it.

The Works of Francis Maitland Balfour, Volume II (of 4) |Francis Maitland Balfour
When the egg of Amphioxus is in the blastosphere stage we cannot speak of either an epiblast or hypoblast.

The Works of Francis Maitland Balfour, Volume 1 |Francis Maitland Balfour

One-half of the blastosphere may be pushed in towards the other half.

The Works of Francis Maitland Balfour, Volume II (of 4) |Francis Maitland Balfour

blastosphere

/ (ˈblæstəʊˌsfɪə) /

another name for blastula

another name for blastocyst (def. 1)