单词 | hypochromatosis |
释义 | hypochromatosisn. Cytology. An abnormally small amount of chromatin or number of chromosomes in a cell or nucleus. ΘΚΠ the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromatin > state of hyperchromatosis1898 chromaticity1904 hypochromatosis1913 hyperchromasia1930 1913 J. Ritchie in Pembrey & Ritchie Text-bk. Gen. Path. viii. 240 In malignant tumours the division of the chromosomes between the poles is often unequal... This can be recognized by the existence of differences in size and staining qualities of the nuclei, and the two phenomena are sometimes referred to as hyperchromatosis and hypochromatosis. 1919 Encycl. Medica (ed. 2) VI. 311 Hypochromatosis is a deficiency in chromatin—thus nuclear hypochromatosis is the condition of the nucleus of a cell in which there is a reduction in the number of chromosomes. This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2018). < n.1913 |
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