blastodermn.

/ˈblastəʊdəːm/

Etymology: < blasto- comb. form + Greek δέρμα, δέρματ- skin.

Biology.

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: cf. -blast comb. form), from one or other of which all the parts of the new animal are developed.

ΘΚΠ

the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > embryo parts > [noun] > membrane and layers of cells

germinal layer1836

cell layer1843

mucous layer1846

germ layer1855

mesoblast1857

blastoderm1859

head fold1873

mesoderm1873

epiblast1875

hypoblast1875

splanchnopleure1875

mesenchyme1881

acroblast1884

mesothelium1886

epimere1890

mesectoderm1894

mesendoderm1894

cœloblast1895

placode1907

shield1913

mesentoderm1921

meristoderm1945

bilayer1962

1859 Todd's Cycl. Anat. & Physiol. V. 46/1 A layer of nucleated organised cells, named by Pander Blastoderm or germinal membrane.

1877 T. H. Huxley Man. Anat. Invertebrated Animals iii. 110 The cells of the blastoderm give rise to the histological elements of the adult body.

1881 St. G. Mivart Cat 319.

Derivatives

blastoderˈmatic adj. of or pertaining to the blastoderm.

ΘΚΠ

the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > embryo parts > [adjective] > blastoderm, etc.

blastodermic1835

blastodermatic1849

mesoblastic1874

mesodermic1875

hypoblastic1877

mesodermal1877

involunto-motory1878

homodermic1883

mesothelial1886

epiblastic1887

triploblastic1888

tetrablastic1891

triblastic1901

1849–52 Todd's Cycl. Anat. & Physiol. IV. ii. 975/1 In one germinal membrane or blastodermatic vesicle.

blastoˈdermic adj. of or pertaining to the blastoderm.

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