Etymology

butylene

B3U1T1Y4L1E1N1E1

Today it means: Any of three isomeric aliphatic alkenes containing four carbon atoms and one double bond; their polymers are used as synthetic rubber. Full definition →

Ancient Greek ῡ̔́λη (hū́lē) ← Proto-Indo-European *swel-der.? ← English but-
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The story

  1. Proto-Indo-European*gʷṓws
  2. Proto-Hellenic*gʷous
  3. Ancient Greekβοῦς (boûs)
  4. Proto-Indo-European*tewh₂-
  5. Proto-Indo-European*tuh₂rós
  6. Proto-Hellenic*tūrós
  7. Ancient Greekτῡρός (tūrós)
  8. Ancient Greekβούτῡρος (boútūros)
  9. Englishbut-
  10. Proto-Indo-European*swel-der.?
  11. Ancient Greekῡ̔́λη (hū́lē)
  12. English todaybutylene

From but- + -ylene.

Etymology from Wiktionary, CC BY-SA 4.0.