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

When the egg of Amphioxus is in the blastosphere stage we cannot speak of either an epiblast or hypoblast.

From Project Gutenberg

The hollow sphere which is thus formed is the important stage of the “germinal vesicle,” the blastula, or blastosphere.

From Project Gutenberg

Thus, an oval and an elongate egg produce respectively an oval and an elongate blastosphere.

From Project Gutenberg

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

From Project Gutenberg

The central part of the blastosphere is called the segmentation cavity or blastocoel.

From Project Gutenberg