Etymology

colourimetric

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Latin metricus ← Ancient Greek μέτρον (métron) ← Proto-Indo-European *meh₁-
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The story

  1. Englishcolour
  2. Proto-Indo-European*med-
  3. Proto-Indo-European*meh₁-
  4. Ancient Greekμέτρον (métron)
  5. Ancient Greekμετρῐκός (metrĭkós)
  6. Ancient Greekμέτρον (métron)
  7. Latinmetrum
  8. Latinmetricus
  9. English todaycolourimetric

From colour + -metric.

Etymology from Wiktionary, CC BY-SA 4.0.