Etymology

isopeptide

I1S1O1P3E1P3T1I1D2E1

Today it means: A compound of two or more amino acids (a peptide) in which an amide link involves an amino group not in the alpha- position Full definition →

English peptide ← German Peptid ← Proto-Indo-European *dʰeh₁-
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The story

  1. Ancient Greekῐ̓́σος (ĭ́sos)
  2. Englishiso-
  3. Proto-Indo-European*pekʷ-
  4. Proto-Indo-European*pékʷ-ye-
  5. Proto-Hellenic*pét͏̌t͏̌ō
  6. Ancient Greekπέσσω (péssō)bf.
  7. Ancient Greekπέπτω (péptō)
  8. Ancient Greekπεπτόν (peptón)
  9. GermanPepton
  10. Englishpeptone
  11. Proto-Indo-European*dʰeh₁-
  12. GermanPepton
  13. GermanPeptid
  14. Englishpeptide
  15. English todayisopeptide

From iso- + peptide.

Etymology from Wiktionary, CC BY-SA 4.0.