het·ero·chro·ma·tin noun \-ˈkrō-mə-tən\
Origin of HETEROCHROMATIN
First Known Use: 1932
het·ero·chro·ma·tin noun \-ˈkrō-mət-ən\ (Medical Dictionary)
: densely staining chromatin that appears as nodules in or along chromosomes and contains relatively few genes
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