Etymology

orthocumulate

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Today it means: A cumulate rock in which the groundmass is of different composition to the accumulated crystals. Full definition →

English cumulate ← Latin cumulātus ← Proto-Indo-European *ḱuh₁mósder.?
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The story

  1. Proto-Indo-European*h₃er-
  2. Proto-Indo-European*dʰeh₁-
  3. Proto-Indo-European*h₃érdʰeti?
  4. Proto-Indo-European*h₃erdʰ-
  5. Proto-Hellenic*ortʰwós
  6. Ancient Greekὀρθός (orthós)
  7. Englishortho-
  8. Proto-Indo-European*ḱewh₁-
  9. Proto-Indo-European*ḱuh₁mósder.?
  10. Latincumulus
  11. Latincumulō
  12. Latincumulātus
  13. Englishcumulate
  14. English todayorthocumulate

From ortho- + cumulate.

Etymology from Wiktionary, CC BY-SA 4.0.