epiblastn.
/ˈɛpɪblɑːst//ˈɛpɪblast/ 1. Botany. (See quot. 1866.)
ΚΠ
1866 J. Lindley & T. Moore Treasury Bot. Epiblast, a small transverse plate (a second cotyledon), found on the embryo of some grasses.
2. Biology. The outermost of the three layers constituting the wall of the blastoderm when fully formed.
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
1875 Huxley in Encycl. Brit. II. 51/1 In the embryo [of the Metazoa] the representatives of these two layers [ectoderm and endoderm] are the epiblast and hypoblast.
1877 T. H. Huxley Man. Anat. Invertebrated Animals i. 50 The inner wall of the sac is the hypoblast (endoderm of the adult), the outer the epiblast (ectoderm).
1881 St. G. Mivart Cat 319 The epiblast investing the whole ovum within the vitelline membrane.
Derivatives
epiˈblastic adj.
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
1887 A. C. Haddon Introd. Study Embryol. ii. 36 The blastoderm of a newly-laid egg..consists of a definite epiblastic layer and an inferior irregular mass of rounded cells.
1893 A. M. Marshall Vertebr. Embryol. 371 The small epiblastic villi of the lower pole of the vesicle.
1921 A. Keith Human Embryol. (ed. 4) i. 12 An epiblastic or ectodermal set [of cells].
This entry has not yet been fully updated (first published 1891; most recently modified version published online September 2021).
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n.1866