Etymology

Mesoarchean

M3E1S1O1A1R1C3H4E1A1N1

Today it means: Of a geologic era within the Archaean eon from about 3200 to 2800 million years ago; stromatolites have existed from this time. Full definition →

English Archean ← 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. EnglishArchean
  9. English todayMesoarchean

From meso- + Archean.

Etymology from Wiktionary, CC BY-SA 4.0.