Etymology

tonometer

T1O1N1O1M3E1T1E1R1

Today it means: An instrument used to measure tension or pressure, especially inside the eye. Full definition →

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

  1. Proto-Indo-European*ten-
  2. Proto-Indo-European*tónos
  3. Proto-Hellenic*tónos
  4. Ancient Greekτόνος (tónos)
  5. Englishtono-
  6. Proto-Indo-European*med-
  7. Proto-Indo-European*meh₁-
  8. Ancient Greekμέτρον (métron)
  9. English todaytonometer

From tono- + -meter.

Etymology from Wiktionary, CC BY-SA 4.0.