Etymology

thermometer

ther·mom·e·ter
T1H4E1R1M3O1M3E1T1E1R1

Today it means: An apparatus used to measure temperature. Full definition →

French thermomètre ← Ancient Greek μέτρον (métron) ← Proto-Indo-European *meh₁-
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The story

  1. Proto-Indo-European*gʷʰer-
  2. Proto-Indo-European*gʷʰermos
  3. Proto-Hellenic*kʷʰermós
  4. Ancient Greekθερμός (thermós)
  5. Frenchthermo-
  6. Proto-Indo-European*med-
  7. Proto-Indo-European*meh₁-
  8. Ancient Greekμέτρον (métron)
  9. Frenchthermomètre
  10. English todaythermometer

Borrowed from French thermomètre; equivalent to thermo- + -meter.

Etymology from Wiktionary, CC BY-SA 4.0.