heterochromatinn.
/ˌhɛtərəʊˈkrəʊmətɪn/ Cytology.
Heterochromatic chromosome material.
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chromatin1882
oxychromatin1894
basichromatin1902
trophochromatin1905
sex chromatin1909
heterochromatin1932
1932 Biol. Abstr. 6 347/1 Chromosomes are composed of sections of heterochromatin and of euchromatin attached end to end.
1941 Ann. Bot. 5 203 Large distal segments which appear as heterochromatin in mitosis, that is to say they are overstained in resting nuclei and, after freezing, understained in metaphase.
1951 G. H. Bourne Cytol. & Cell Physiol. (ed. 2) v. 196 Probably there are many varieties of heterochromatin and euchromatin, constituting a continuous ‘spectrum’, to the two ends of which the terms heterochromatin and euchromatin are somewhat arbitrarily applied.
1969 Nature 16 Aug. 683/1 The observations that heterochromatin formation is a variable property and represents cyclical physiological states of chromosome segments..led to a shift of emphasis from heterochromatin as a substance to heterochromatin as a state.
This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2018).
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n.1932