circa 1925, in the meaning defined above
borrowed from German Chromonem, from chromo- chromo- + -nem, borrowed from Greek nêma "thread" — more at nemato-
The German word was introduced by the Czech zoologist František Vejdovský (1849-1939) in Zum Problem der Vererbungsträger (Prague, 1911-12), p. 130.
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“Chromonema.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chromonema. Accessed 29 Nov. 2020.
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