protoplasm in cell nuclei, 1882, from German, coined 1879 by German anatomist Walther Flemming (1843-1905), from Latinized form of Greek khromat-, the correct combinational form of khroma "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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