astrospheren.
/ˈastrə(ʊ)sfɪə/, U.S. /ˈæstrəˌsfɪ(ə)r/ Cell Biology.
Originally: the aster (aster n. 4(a)) of a dividing cell, or the outer portion of this, exclusive of the centrosome. Later also: the centrosome of a cell.
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the world > life > biology > biological processes > genetic activity > genetic components > [noun] > other structures in mitosis
sun figure1877
aster1879
linin1887
skein1889
spireme1889
tetraster1890
cytaster1892
astrosphere1893
mid-body1896
restitution nucleus1927
synaptonemal complex1958
the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromosome > centrosphere
attraction sphere1875
astrosphere1893
centrosphere1893
1893 Jrnl. Royal Microsc. Soc. 656 For the attractive spheres the author proposes the term astrosphere, and for the astrosphere, together with the surrounding centrosome, centrosphere.
1898 F. M. Mcfarland in D. S. Jordan Foot-notes Evol. vi. 154 This ‘aster’ or ‘astrosphere’ is at first small extent, but grows in size progressively as the two centres move apart.
1901 G. N. Calkins Protozoa 278 This structure resembles the astral system of Metazoa, in consisting of an outer spherical mass with radiating processes (astrosphere).
1924 E. G. Conklin in E. V. Cowdry Gen. Cytol. ix. 544 During resting stages the substance of the aster is condensed into a rounded body, surrounding the centrosome, which is known as the astrosphere.
1961 Biol. Bull. 120 309 These spheres (centrospheres, astrospheres, or centrosomes), 40 μ or more in diameter, with their surrounding rays, are beautifully described as ‘polar suns’.
2005 Neurosci. Res. 53 176 Astrosphere formation induced plasticity of astrocytes by changing the gene expression patterns.
This entry has been updated (OED Third Edition, March 2012; most recently modified version published online December 2021).
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