Etymology

periodo

P3E1R1I1O1D2O1

Today it means: Describing a derivative in which all hydrogen atoms have been replaced by iodine Full definition →

English iodo- ← Ancient Greek ἰοειδής (ioeidḗs) ← Proto-Hellenic *wéidos
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The story

  1. Proto-Indo-European*per-der.?
  2. Proto-Indo-European*pér
  3. Proto-Italic*per
  4. Latinper
  5. Proto-Indo-European*per-
  6. Proto-Italic*peri-
  7. Latinper-
  8. Englishper-
  9. Proto-Hellenic*wion
  10. Ancient Greekἴον (íon)
  11. Proto-Indo-European*weyd-
  12. Proto-Indo-European*wéydos
  13. Proto-Hellenic*wéidos
  14. Ancient Greekεἶδος (eîdos)
  15. Ancient Greekἰοειδής (ioeidḗs)
  16. Englishiodo-
  17. English todayperiodo

From per- + iodo-.

Etymology from Wiktionary, CC BY-SA 4.0.