archiblastn.
/ˈɑːkɪblast/ Embryology.
The formative yolk in an ovum, which constitutes the germ; also applied to the epiblast. (In both uses distinguished from parablast n. 2.)
ΘΚΠ
the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > ovum or ootid > yolk > types of yolk
germ yolk1849
archiblast1876
parablast1876
tropholecithus1879
1876 J. Van Duyn & E. C. Seguin tr. E. L. Wagner Man. Gen. Pathol. 462 The archiblast embraces all tissues.
1876 E. Klein in Q. Jrnl. Microsc. Sci. 16 116 This quasi-extraneous portion of the germ I will call parablast, in contradistinction to the segmented part or blastoderm of the authors, which I will term archiblast... However,..according to His, parablast is not a portion of the same substance of which the blastoderm consists, but is a part of the white yolk.
Derivatives
archiˈblastic adj.
ΚΠ
1885 W. Stirling tr. L. Landois Text-bk. Human Physiol. II. 1128 He calls these structures parablastic, in opposition to the archiblastic, which belong to the three layers of the embryo.
This entry has not yet been fully updated (first published 1933; most recently modified version published online December 2019).
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n.1876