Etymology

diproton

D2I1P3R1O1T1O1N1

Today it means: A hypothetical particle consisting of two protons and no neutrons; a helium-2 nucleus. Presumably an intermediate step in the fusion of hydrogen into helium. Full definition →

English proton ← Ancient Greek πρῶτον (prôton) ← Proto-Indo-European *pró
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The story

  1. Proto-Indo-European*dwóh₁
  2. Proto-Indo-European*dwi-
  3. Proto-Hellenic*dwi-
  4. Ancient Greekδῐ- (dĭ-)
  5. Latindi-
  6. Englishdi-
  7. Proto-Indo-European*per-der.?
  8. Proto-Indo-European*pér
  9. Proto-Indo-European*pró
  10. Ancient Greekπρό (pró)
  11. Ancient Greekπρῶτον (prôton)
  12. Englishproton
  13. English todaydiproton

From di- + proton.

Etymology from Wiktionary, CC BY-SA 4.0.