Etymology

thiolactone

T1H4I1O1L1A1C3T1O1N1E1

Today it means: Any of a class of compounds formally derived from the lactones by replacing either, or both, of the oxygen atoms with sulfur Full definition →

English lactone ← German Keton ← Latin lac
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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. Englishlactone
  10. English todaythiolactone

From thio- + lactone.

Etymology from Wiktionary, CC BY-SA 4.0.