Etymology

pyrrolidone

P3Y4R1R1O1L1I1D2O1N1E1

Today it means: any of a class of heterocyclic ketones derived from a pyrrolidine; especially 2-pyrrolidone, the simplest γ-lactam Full definition →

English ketone ← German Keton ← Ancient Greek πῠρρός (pŭrrhós)
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The story

  1. Proto-Indo-European*péh₂wr̥
  2. Proto-Hellenic*pāwər
  3. Ancient Greekπῦρ (pûr)
  4. Ancient Greekπῠρρός (pŭrrhós)
  5. GermanPyrro
  6. Englishpyrrole
  7. Englishpyrrolidine
  8. GermanKeton
  9. Englishketone
  10. English todaypyrrolidone

From pyrrolidine + -one.

Etymology from Wiktionary, CC BY-SA 4.0.