Etymology

hydrometer

H4Y4D2R1O1M3E1T1E1R1

Today it means: An instrument that floats in a liquid and measures its specific gravity on a scale. Full definition →

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

  1. Proto-Indo-European*wed-
  2. Proto-Indo-European*wódr̥
  3. Proto-Hellenic*údōr
  4. Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
  5. Ancient Greekῠ̔δρο- (hŭdro-)
  6. Englishhydro-
  7. Proto-Indo-European*med-
  8. Proto-Indo-European*meh₁-
  9. Ancient Greekμέτρον (métron)
  10. English todayhydrometer

From hydro- + -meter.

Etymology from Wiktionary, CC BY-SA 4.0.