Etymology

heptahelical

H4E1P3T1A1H4E1L1I1C3A1L1

Today it means: having seven helices; especially describing a portion of a protein having seven associated α-helices Full definition →

English helical ← Ancient Greek ἑπτᾰ́ (heptắ) ← Proto-Hellenic *heptə́
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The story

  1. Proto-Afroasiatic*sṗɣ?
  2. Proto-Semitic*šabʕ-bor.?
  3. Proto-Indo-European*septḿ̥
  4. Proto-Hellenic*heptə́
  5. Ancient Greekἑπτᾰ́ (heptắ)
  6. Englishhepta-
  7. Englishhelical
  8. English todayheptahelical

From hepta- + helical.

Etymology from Wiktionary, CC BY-SA 4.0.