From Greek 'khroma' (colour) — the musical sense meant 'colourful' intervals that add richness beyond the basic scale.
Relating to or produced by colour; (in music) relating to or using notes not belonging to the diatonic scale of the key in which a passage is written.
From Latin 'chrōmaticus,' from Greek 'khrōmatikós' (relating to colour, suited for colour), from 'khrōma,' genitive 'khrōmatos' (colour, complexion, the colour of the skin). The Greek 'khrōma' is thought to derive from PIE *gʰrē- or *gʰreu- (to rub, to grind), the original sense being the colour that is rubbed or smeared on — a pigment. The musical sense, already present in ancient Greek music
The word 'chromosome' — literally 'colour body' — was coined in 1888 by the German anatomist Heinrich Wilhelm Waldeyer because chromosomes absorbed certain laboratory dyes very readily, making them intensely coloured under the microscope. The structures that carry our genetic code are thus named not for their biological function but for their staining properties — a reminder that scientific nomenclature often captures the moment of discovery rather than the thing discovered.
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