Etymology

thermopile

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Today it means: An electronic device that converts thermal energy into electrical energy. Usually constructed using a series-combination of thermocouples Full definition →

English pile ← Ancient Greek θερμός (thermós) ← Proto-Hellenic *kʷʰermós
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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. Englishthermo-
  6. Englishpile
  7. English todaythermopile

From thermo- + pile.

Etymology from Wiktionary, CC BY-SA 4.0.