parablastn.

Brit.

/ˈparəblɑːst/,

/ˈparəblast/, U.S.

/ˈpɛrəˌblæst/

Origin: Formed within English, by derivation. Etymons: para- prefix¹, -blast comb. form.

Etymology: < para- prefix¹ + -blast comb. form; in sense 1 after either German Parablast (G. Eisenmann Die vegetativen Krankheiten und die entgiftende Heilmethode (1835) 227) or scientific Latin parablasta (1844 or earlier); in sense 2 after German Parablast (W. His Untersuchungen über die erste Anlage des Wirbelthierleibes (1868) 39).

†1. Medicine. A disease that alters anatomical structure. Obsolete. rare.Apparently only attested in dictionaries or glossaries.

ΚΠ

1857 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Parablasta, term used by Eisenmann for disease with anatomical conversion or alteration: a parablast.

2. Embryology. Esp. in the terminology of W. His: a layer of cells that gives rise to the blood vessels and connective tissue of the embryo (embryonic mesenchyme), (supposedly) located outside the blastoderm. Now historical.

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 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.

1888 Q. Jrnl. Microsc. Sci. 29 195 There are here also plenty of mesoblast—pardon, ‘parablast’ cells in the neighbourhood.

1940 Q. Rev. Biol. 15 6/2 This theory..claimed that the archiblast..gives rise to all the embryo except the blood vessels and connective tissue which are furnished by the parablast.

1999 Isis 90 469 I will not examine his daring and controversial ‘parablast’ theory but focus on the second of the two major claims he made in a series of publications between 1866 and 1875.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).

单词	parablast
释义	parablastn. Brit. /ˈparəblɑːst/, /ˈparəblast/, U.S. /ˈpɛrəˌblæst/ Origin: Formed within English, by derivation. Etymons: para- prefix¹, -blast comb. form. Etymology: < para- prefix¹ + -blast comb. form; in sense 1 after either German Parablast (G. Eisenmann Die vegetativen Krankheiten und die entgiftende Heilmethode (1835) 227) or scientific Latin parablasta (1844 or earlier); in sense 2 after German Parablast (W. His Untersuchungen über die erste Anlage des Wirbelthierleibes (1868) 39). †1. Medicine. A disease that alters anatomical structure. Obsolete. rare.Apparently only attested in dictionaries or glossaries. ΚΠ 1857 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Parablasta, term used by Eisenmann for disease with anatomical conversion or alteration: a parablast. 2. Embryology. Esp. in the terminology of W. His: a layer of cells that gives rise to the blood vessels and connective tissue of the embryo (embryonic mesenchyme), (supposedly) located outside the blastoderm. Now historical. 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 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. 1888 Q. Jrnl. Microsc. Sci. 29 195 There are here also plenty of mesoblast—pardon, ‘parablast’ cells in the neighbourhood. 1940 Q. Rev. Biol. 15 6/2 This theory..claimed that the archiblast..gives rise to all the embryo except the blood vessels and connective tissue which are furnished by the parablast. 1999 Isis 90 469 I will not examine his daring and controversial ‘parablast’ theory but focus on the second of the two major claims he made in a series of publications between 1866 and 1875. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < n.1857
随便看	to press into service to press on canvas to press on regardless to press on sail to press sail to press the button to press the buttons to press the flesh to press the panic button to press the right buttons to press to death to presume of oneself to presume on, upon, or of to presume oneself to presume upon oneself to pretty up to prevail on to prevail to to prevail upon to prevail with to prey of to prey on to prey on one's mind to prey over to prey upon