Etymology

photoproton

P3H4O1T1O1P3R1O1T1O1N1

Today it means: Any proton produced in a photonuclear reaction Full definition →

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

  1. Proto-Indo-European*bʰeh₂-
  2. Proto-Indo-European*bʰéh₂os
  3. Proto-Hellenic*pʰáwos
  4. Ancient Greekφᾰ́ος (phắos)
  5. Ancient Greekφῶς (phôs)
  6. Ancient Greekφωτο- (phōto-)
  7. Englishphoto-
  8. Proto-Indo-European*per-der.?
  9. Proto-Indo-European*pér
  10. Proto-Indo-European*pró
  11. Ancient Greekπρό (pró)
  12. Ancient Greekπρῶτον (prôton)
  13. Englishproton
  14. English todayphotoproton

From photo- + proton.

Etymology from Wiktionary, CC BY-SA 4.0.