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chromosome

/ˈkɹəʊ.məˌsəʊm/ noun

Origin

19th century: from German Chromosom, ultimately from Ancient Greek χρῶμα (khrôma, “colour”) + σῶμα (sôma, “body”) (because they are stained under the microscope). Equivalent to chromo- + -some.

From Wiktionary, via Kaikki.org (CC BY-SA)