Etymology

thiolactam

T1H4I1O1L1A1C3T1A1M3

Today it means: Any compound formally derived from a lactam by replacing the oxygen atom with sulfur; a cyclic thioamide Full definition →

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

  1. Proto-Indo-European*dʰewh₂-der.?
  2. Ancient Greekθέειον (théeion)
  3. Ancient Greekθεῖον (theîon)
  4. Englishthio-
  5. Latinlac
  6. Englishlacto-
  7. GermanKeton
  8. Englishketone
  9. Englishlac(tone)
  10. Egyptianjmn
  11. Ancient GreekᾸ̓́μμων (Ắmmōn)
  12. LatinAmmōn
  13. Latinammoniacus
  14. Englishammonia
  15. Proto-Indo-European*dʰeh₁-
  16. Englisham(ide)
  17. Englishlactam
  18. English todaythiolactam

From thio- + lactam.

Etymology from Wiktionary, CC BY-SA 4.0.