Etymology

densitometry

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Today it means: The measurement of optical density by use of a densitometer. Full definition →

Ancient Greek μέτρον (métron) ← Proto-Indo-European *meh₁- ← English density
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The story

  1. Englishdensity
  2. Proto-Indo-European*med-
  3. Proto-Indo-European*meh₁-
  4. Ancient Greekμέτρον (métron)
  5. English todaydensitometry

From density + -o- + -metry.

Etymology from Wiktionary, CC BY-SA 4.0.