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[kroh-muh-tin] /ˈkroʊ mə tɪn/

noun, Cell Biology.
the readily stainable substance of a cell nucleus, consisting of DNA, RNA, and various proteins, that forms chromosomes during cell division.
(cytology) the part of the nucleus that consists of DNA and proteins, forms the chromosomes, and stains with basic dyes See also euchromatin, heterochromatin

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). Related: Chromatid. Cf. chromosome.

chromatin chro·ma·tin (krō’mə-tĭn)
A complex of nucleic acids and proteins in the cell nucleus that stains readily with basic dyes and condenses to form chromosomes during cell division.
The substance distributed in the nucleus of a cell that condenses to form chromosomes during cell division. It consists mainly of DNA and proteins called histones.


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  • Chromatism

    [kroh-muh-tiz-uh m] /ˈkroʊ məˌtɪz əm/ noun 1. . 2. the abnormal coloration of leaves or other normally green parts of a plant. chromatism chro·ma·tism (krō’mə-tĭz’əm) n.

  • Chromato-

    1. a combining form meaning “color,” used in the formation of compound words in this sense and in the specialized sense of “chromatin”: chromatophore; chromatolysis. combining form 1. indicating colour or coloured: chromatophore 2. indicating chromatin: chromatolysis before vowels chromat-, word forming element indicating “color; chromatin,” from Latinized form of Greek khromato-, from khroma (see […]

  • Chromatogenous

    chromatogenous chro·ma·tog·e·nous (krō’mə-tŏj’ə-nəs) adj. Producing color; causing pigmentation.

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