centromeren.
/ˈsɛntrə(ʊ)mɪə/, U.S. /ˈsɛntrəˌmɪ(ə)r/ Cell Biology.† 1. A region within the oocyst of a malaria parasite ( Plasmodium) around which sporozoites develop. Obsolete. rare.† 2. The neck region of a sperm cell. Obsolete. rare.
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1901 L. O. Howard Mosquitoes ii. 51 These clear spaces are known as centromeres, and they are rapidly surrounded by minute short dark lines, which, when seen under a very high power of the microscope, are shown to be spindle-shaped cells, known as blasts.
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the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > sperm > sperm cell > constituents or stages
acrosome1899
idiosome1899
idiozome1899
acroblast1907
centromere1925
1925 E. B. Wilson Cell (ed. 3) 1127 Centromere, that part of the sperm containing the central bodies; especially the neck-region.
3. A constricted region on a chromosome where two sister chromatids are joined, esp. during metaphase; the region on a chromosome to which the spindle is attached during mitosis via the kinetochore.
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the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromosome > centromere
attachment constriction1925
kinetochore1934
centromere1936
1936 C. D. Darlington in Cytologia 7 249 The stage when the chromosomes are lying with their spindle attachment chromomeres, or centromeres as I propose to call them, on the equator of the mitotic spindle.
1949 New Biol. 7 73 The centromere of a fully contracted chromosome is generally recognisable as a non-staining constriction.
1968 Brit. Med. Bull. 24 261/1 A chromosome may appear to have two centromeres if the outline alone is taken into consideration.
2004 S. Keppler in C. W. Smith et al. Corn ii. iv. 402 The chromosomes of maize also vary in the position of the centromere.
This entry has been updated (OED Third Edition, June 2016; most recently modified version published online December 2021).
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n.1901