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blastoderm
[ blas-tuh-durm ]
noun
- the primitive layer of cells that results from the segmentation of the ovum.
- the layer of cells forming the wall of the blastula, and in most vertebrates enclosing a cavity or a yolk mass.
blastoderm
/ ˈblæstəʊˌdɜːm /
noun
- the layer of cells that surrounds the blastocoel of a blastula
- a flat disc of cells formed after cleavage in a heavily yolked egg, such as a bird's egg
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Derived Forms
- ˌblastoˈdermic, adjective
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Other Words From
- blasto·dermic blasto·der·matic adjective
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Word History and Origins
Origin of blastoderm1
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Example Sentences
For hardening the blastoderm I have employed, as usual, chromic acid, and also gold chloride.
If the outlines only of the cells are to be examined, a very short immersion (half a minute) of the blastoderm in a half per cent.
My observations begin with the blastoderm of a freshly laid egg.
The changes which the blastoderm undergoes during the first three or four hours of incubation are not very noticeable.
I have already spoken of the gradation of the hypoblast at the edge of the blastoderm into white yolk.
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