Etymology

mesopause

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Today it means: In the atmosphere, the boundary between the mesosphere and the thermosphere or ionosphere and the boundary where the temperature reaches its minimum value. Full definition →

English meso- ← Ancient Greek μέσος (mésos) ← Proto-Hellenic *métsos
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The story

  1. Proto-Indo-European*me
  2. Proto-Indo-European*dʰeh₁-?
  3. Proto-Indo-European*médʰi
  4. Proto-Indo-European*médʰyos
  5. Proto-Hellenic*métsos
  6. Ancient Greekμέσος (mésos)
  7. Englishmeso-
  8. English todaymesopause

From meso- (“middle”) + -pause (“boundary”).

Etymology from Wiktionary, CC BY-SA 4.0.