Etymology

hypocycloid

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Today it means: Synonym of epicycloid. Full definition →

English cycloid ← Ancient Greek ὑπο- (hupo-) ← Proto-Indo-European *upó
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The story

  1. Proto-Indo-European*upó
  2. Ancient Greekῠ̔πό (hŭpó)
  3. Ancient Greekὑπο- (hupo-)
  4. Englishhypo-
  5. Englishcycloid
  6. English todayhypocycloid

From hypo- (“below or inside”) + cycloid.

Etymology from Wiktionary, CC BY-SA 4.0.