periblastn.
/ˈpɛrɪblɑːst/, /ˈpɛrɪblast/, U.S. /ˈpɛrəˌblæst/ Biology.† 1. = cytoplasm n. Obsolete. rare.Apparently only attested in dictionaries or glossaries.
ΘΚΠ
the world > life > biology > substance > cell > cell substance > [noun] > main part of
periplast1853
periblast1857
1857 R. Dunglison Med. Lexicon (rev. ed.) 694/1 Periblast.., the amorphous matter, which surrounds the endoblast..or cell nucleus, and undergoes segmentation.
2. Embryology. An acellular layer of protoplasm lying between the blastomere and the yolk of a meroblastic egg.
ΘΚΠ
the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > ovum or ootid > protoplasm or cytoplasm
periblast1885
ovoplasm1890
ooplasm1899
1885 A. Agassiz & C. O. Whitman in Proc. Amer. Acad. Arts & Sci. 1884–5 20 42 For this portion of the ovum we propose the name periblast,—a name which has the advantage of not prejudging the question of the origin and destination of the part it designates.
1915 Proc. National Acad. Sci. U.S.A. 1 558 The cavity in many of the hearts is..obliterated by the presence of periblastic material and huge amorphous periblast nuclei.
1962 K. F. Lagler et al. Ichthyol. x. 305 The blastocoele or segmentation cavity is between the outer blastoderm and the central periblast that covers the yolk beneath the blastoderm.
1994 Amer. Naturalist 144 136 A multinucleate yolk syncytial layer between the yolk and the middle layer (equivalent to the periblast of the older literature).
This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).
<
n.1857