Etymology

hyperboloid

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Today it means: A particular surface in three-dimensional Euclidean space, the graph of a quadratic with all three variables squared and their coefficients not all of the same sign. Full definition →

Ancient Greek εἶδος (eîdos) ← Proto-Hellenic *wéidos ← Proto-Indo-European *wéydos
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The story

  1. Proto-Indo-European*úp
  2. Proto-Indo-European*upér
  3. Proto-Hellenic*hupér
  4. Ancient Greekῠ̔πέρ (hŭpér)
  5. Ancient Greekὑπερ- (huper-)
  6. Proto-Indo-European*gʷelH-
  7. Proto-Hellenic*gʷəlnō
  8. Ancient Greekβάλλω (bállō)
  9. Ancient Greekὑπερβάλλω (huperbállō)
  10. Ancient Greekὑπερβολή (huperbolḗ)
  11. New Latinhyperbola
  12. Englishhyperbola
  13. Proto-Indo-European*weyd-
  14. Proto-Indo-European*wéydos
  15. Proto-Hellenic*wéidos
  16. Ancient Greekεἶδος (eîdos)
  17. English todayhyperboloid

From hyperbola + -oid.

Etymology from Wiktionary, CC BY-SA 4.0.