Etymology

spirolactam

S1P3I1R1O1L1A1C3T1A1M3

Today it means: Any spiro compound containing a bridged lactam group Full definition →

English lactam ← Proto-Indo-European *dʰeh₁- ← Latin ammoniacus
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The story

  1. Proto-Indo-European*sper-
  2. Proto-Indo-European*sper-yeh₂-
  3. Ancient Greekσπεῖρα (speîra)
  4. Latinspīra
  5. Englishspiro-
  6. Latinlac
  7. Englishlacto-
  8. GermanKeton
  9. Englishketone
  10. Englishlac(tone)
  11. Egyptianjmn
  12. Ancient GreekᾸ̓́μμων (Ắmmōn)
  13. LatinAmmōn
  14. Latinammoniacus
  15. Englishammonia
  16. Proto-Indo-European*dʰeh₁-
  17. Englisham(ide)
  18. Englishlactam
  19. English todayspirolactam

From spiro- + lactam.

Etymology from Wiktionary, CC BY-SA 4.0.