Etymology
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chromatin (n.)

protoplasm in cell nuclei, 1882, from German, coined 1879 by German anatomist Walther Flemming (1843-1905), from Latinized form of Greek khrōmat-, the correct combinational form of khrōma "color" (see chroma) + chemical suffix -in (2). So called because it has a special affinity for coloring matter and stains readily. Related: Chromatid. Compare chromosome.

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Definitions of chromatin

chromatin (n.)
the readily stainable substance of a cell nucleus consisting of DNA and RNA and various proteins; during mitotic division it condenses into chromosomes;
Synonyms: chromatin granule
From wordnet.princeton.edu