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blastoderm

[blas-tuh-durm] /ˈblæs təˌdɜrm/
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
1855-1860
1855-60; blasto- + -derm
Related forms
blastodermic, blastodermatic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for blastoderm

blastoderm

/ˈblæstəʊˌdɜːm/
noun (embryol)
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
Also called blastodisc
Derived Forms
blastodermic, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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blastoderm in Medicine

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
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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