cytastern.

/ˈsʌɪtastə/

Etymology: < German cytaster (W. Flemming Zellsubstanz (1882) 379), formed as cytase n. + aster n. 4.

Biology.

(a) = aster n. 4. (b) An aster-like structure which may be present in or induced in the cell when the nucleus is not dividing.

ΘΚΠ

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

1892 A. A. Crozier Dict. Bot. Terms 50/2 Cytaster, a series of achromatic rays extending from each pole of the nucleus in karyokinesis into the cytoplasm.

1901 E. B. Wilson in Arch. f. Entwickelungsmechanik XII. 541 In these eggs the first stage is..followed by the appearance of a variable number of vague clear spots in the cytoplasm which..become surrounded with radiating lines of granules and finally assume the form of asters. These, which are obviously identical with Morgan's ‘artificial astrospheres’, may be called cytasters, in contradistinction to the nuclear asters that are connected with the nucleus.

1925 E. B. Wilson Cell (ed. 3) 1129 Cytaster... An aster not associated with chromosomes; commonly employed as equivalent to ‘accessory aster’ or supernumerary aster.

1952 A. F. W. Hughes Mitotic Cycle iv. 108 Cytasters induced in activated Echinarachnius eggs were examined.

1960 L. Picken Organization of Cells vii. 254 Any part of the cytoplasm can participate in the formation of scattered cytasters and of the normal amphiaster.

This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2018).

单词	cytaster
释义	cytastern. /ˈsʌɪtastə/ Etymology: < German cytaster (W. Flemming Zellsubstanz (1882) 379), formed as cytase n. + aster n. 4. Biology. (a) = aster n. 4. (b) An aster-like structure which may be present in or induced in the cell when the nucleus is not dividing. ΘΚΠ 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 1892 A. A. Crozier Dict. Bot. Terms 50/2 Cytaster, a series of achromatic rays extending from each pole of the nucleus in karyokinesis into the cytoplasm. 1901 E. B. Wilson in Arch. f. Entwickelungsmechanik XII. 541 In these eggs the first stage is..followed by the appearance of a variable number of vague clear spots in the cytoplasm which..become surrounded with radiating lines of granules and finally assume the form of asters. These, which are obviously identical with Morgan's ‘artificial astrospheres’, may be called cytasters, in contradistinction to the nuclear asters that are connected with the nucleus. 1925 E. B. Wilson Cell (ed. 3) 1129 Cytaster... An aster not associated with chromosomes; commonly employed as equivalent to ‘accessory aster’ or supernumerary aster. 1952 A. F. W. Hughes Mitotic Cycle iv. 108 Cytasters induced in activated Echinarachnius eggs were examined. 1960 L. Picken Organization of Cells vii. 254 Any part of the cytoplasm can participate in the formation of scattered cytasters and of the normal amphiaster. This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2018). < n.1892
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