hypoblastn.
/ˈhɪpə(ʊ)blɑːst//ˈhɪpə(ʊ)blast//ˈhʌɪpə(ʊ)blɑːst//ˈhʌɪpə(ʊ)blast/ 1. Botany. The flat dorsal cotyledon of a grass. ? Obsolete.
ΘΚΠ
the world > plants > particular plants > plants and herbs > a grass or grasses > [noun] > part of
bladec1450
grass root1474
bent1577
chat1601
grasstop1659
knee1678
locusta1707
straw1776
spikelet1793
strap1793
sheath-scale1796
spiket1796
stragule1821
scutellum1832
scobina1839
rachilla1842
chaff-scale1856
coleorhiza1866
hypoblast1882
lemma1906
1830 J. Lindley Introd. Nat. Syst. Bot. 296 Esenbeck..seems to entertain the opinion that this cotyledon [of grasses] is a special organ, for which he retains Richard's name of hypoblastus.
1855 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Hypoblastus.]
1882 Ogilvie's Imperial Dict. (new ed.)
1888 New Sydenham Soc. Lexicon Hypoblast, term given by L. C. Richard and Nees von Esenbeck to the lateral expansion of the axis of the embryo of the Gramineæ. It is the cotyledon of Kunth, Brown, Poiteau, Turpin, Fischer, and Treviranus, and the scutellum of Gärtner.
2. Biology. The inner layer of cells in the blastoderm n.
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).
1896 T. C. Allbutt et al. Syst. Med. I. 59 The endoderm or hypoblast, appears as a cul-de-sac.
Derivatives
hypoblastic adj. /hɪpəʊ-//haɪpəʊˈblæstɪk/ of or belonging to the hypoblast.
/haɪpəʊˈblæstɪk/ of or belonging to the hypoblast.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
1877 T. H. Huxley Man. Anat. Invertebrated Animals xii. 663 The hypoblastic cells are invested by those of the epiblast.
1897 T. C. Allbutt et al. Syst. Med. III. 680 The body cavity is the outgrowth from the primitive alimentary canal with the hypoblastic covering of which its lining membrane is continuous.
This entry has not yet been fully updated (first published 1899; most recently modified version published online September 2020).
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n.1875