Etymology

rolleron

R1O1L1L1E1R1O1N1

Today it means: An aerodynamic control surface device, used to control against unwanted rolling (rotation) about the axis of movement. The moving wingtip is self-gyro-stabilized with a rolling bladed wheel catching the airstream, providing the gyroscopic moment. Full definition →

English aileron ← French aileron ← Middle French aisle
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The story

  1. Proto-Indo-European*Hreth₂-
  2. Proto-Indo-European*Hróth₂eh₂
  3. Proto-Italic*rotā
  4. Latinrota
  5. Latinrotula
  6. Latinrotulāre
  7. Old Frenchroeler
  8. Middle Englishrollen
  9. Englishroll
  10. Proto-Indo-European*h₂eǵ-?
  11. Proto-Indo-European*h₂eḱs-
  12. Proto-Italic*aksis
  13. Latinaxis
  14. Latin*axla
  15. Latināla
  16. Old Frenchaile
  17. Middle Frenchaisle
  18. Frenchaile
  19. Frenchaileron
  20. Englishaileron
  21. English todayrolleron

Blend of roll + aileron.

Etymology from Wiktionary, CC BY-SA 4.0.