1) Blastodisc 2) Germinal area 3) Germinal disc 4) Layer
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https://www.crosswordclues.com/clue/blastoderm
1) Blastodisc
Found on
https://www.crosswordclues.com/clue/blastoderm
The blastoderm is a term for cell layers found in blastulas. ==In eutherians== ==In amniotes== A blastoderm is the layer of cells formed at one pole of macrolecithal eggs such as the yolky egg of birds. The yolk prevents the division from taking place through the egg, resulting in meroblastic cleavage during the many cleavage divisions. At the ani...
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http://en.wikipedia.org/wiki/Blastoderm
• (n.) The germinal membrane in an ovum, from which the embryo is developed.
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http://thinkexist.com/dictionary/meaning/blastoderm/
(from the article `blastula`) ...sphere of cells, or blastomeres, produced during the development of an embryo by repeated cleavage of a fertilized egg. The cells of the blastula ... ...in a layer from one to several cells thick surrounding the cavity. The embryo at this stage may be likened to a hollow ball and is known as a ... [2 ...
Found on
http://www.britannica.com/eb/a-z/b/77
In many eggs with a large amount of yolk, cell division (cleavage) is restricted to a superficial layer of the fertilized egg (meroblastic cleavage). This layer is termed the blastoderm. In birds it is a flat disc of cells at one pole of the egg and in insects an outer layer of cells surrounding the yolk mass. ... (18 Nov 1997) ...
Found on
http://www.encyclo.co.uk/local/20973
(blas´to-dәrm) collectively, the mass of cells produced by cleavage of a zygote, forming the hollow sphere of the blastula, or the cellular cap above a floor of segmented yolk in the discoblastula of telolecithal eggs.
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http://www.encyclo.co.uk/local/21001
In many eggs with a large amount of yolk, cell division (cleavage) is restricted to a superficial layer of the fertilized egg (meroblastic cleavage). This layer is termed the blastoderm. In birds it is a flat disc of cells at one pole of the egg and in insects an outer layer of cells surrounding the yolk mass.
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http://www.encyclo.co.uk/visitor-contributions.php
Blas'to·derm noun [ Greek
blasto`s sprout + English
derm .]
(Biol.) The germinal membrane in an ovum, from which the embryo is developed.
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http://www.encyclo.co.uk/webster/B/63
Type: Term Pronunciation: blas′tō-derm, -tō-der′ma Definitions: 1. The thin, disc-shaped cell mass of a young embryo and its extraembryonic extensions over the surface of the yolk; when fully formed, all three primary germ layers (ectoderm, endoderm, and mesoderm) are present. Synonyms: germ membrane, germinal membrane, membra...
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http://www.medilexicon.com/medicaldictionary.php?t=10598
In biology, blastoderm is the germinal skin or membrane forming the superficial layer of the impregnated ovum, and from which the rudiment of the new being is formed.
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http://www.probertencyclopaedia.com/browse/BBA.HTM
[
n] - a layer of cells on the inside of the blastula
Found on
http://www.webdictionary.co.uk/definition.php?query=blastoderm
blastoderm, blastodermic, blastodermatic The germinal skin or membrane surrounding the yolk in the impregnated living ovum, and constituting the superficial layer of the embryo in its earliest condition. It divides into two and afterwards three layers of cells (the epiblast, mesoblast, and hypoblast, from one or other of which all the parts of the ...
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http://www.wordinfo.info/words/index/info/view_unit/298/
In avian biology, the flattened disc of dividing cells that lies on the upper surface of the yolk and is the first stage in the development of the embryo.
Found on
https://academy.allaboutbirds.org/bird-academys-a-to-z-glossary-of-bird-ter
germinal disc noun a layer of cells on the inside of the blastula
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https://www.encyclo.co.uk/local/20974
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.
Found on
https://www.infoplease.com/dictionary/blastoderm
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