blastoderm

blastoderm

[blas-tuh-durm]
noun Embryology.
1.
the primitive layer of cells that results from the segmentation of the ovum.
2.
the layer of cells forming the wall of the blastula, and in most vertebrates enclosing a cavity or a yolk mass.

Origin:
1855–60; blasto- + -derm

blastodermic, blastodermatic, adjective
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World English Dictionary
blastoderm (ˈblæstəʊˌdɜːm)
 
n
1.  the layer of cells that surrounds the blastocoel of a blastula
2.  a flat disc of cells formed after cleavage in a heavily yolked egg, such as a bird's egg
 
blasto'dermic
 
adj

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American Heritage
Medical Dictionary

blastoderm blas·to·derm (blās'tə-dûrm') or blas·to·der·ma (blās'tə-dûr'mə)
n.
The layer of cells formed by the cleavage of a fertilized mammalian egg, which later divides into the three germ layers from which the embryo develops. Also called germinal membrane, germ membrane.


blas'to·der'mal or blas'to·der'mic or blas'to·der·mat'ic (-dər-māt'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
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