Etymology

semiaxis

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Today it means: A line segment, joining the centre of a figure to an edge, that forms half of an axis of symmetry. Full definition →

English axis ← Latin axis ← Proto-Italic *aksis
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The story

  1. Proto-Indo-European*sem-
  2. Proto-Indo-European*sēmi
  3. Latinsēmi-
  4. Englishsemi-
  5. Proto-Indo-European*h₂eǵ-?
  6. Proto-Indo-European*h₂eḱs-
  7. Proto-Italic*aksis
  8. Latinaxis
  9. Englishaxis
  10. English todaysemiaxis

From semi- + axis.

Etymology from Wiktionary, CC BY-SA 4.0.