Etymology

spiro-annulated

Today it means: Describing two rings that are joined, via a single atom, to form a spiro compound. Full definition →

English annulated ← Latin spīra ← Ancient Greek σπεῖρα (speîra)
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The story

  1. Proto-Indo-European*sper-
  2. Proto-Indo-European*sper-yeh₂-
  3. Ancient Greekσπεῖρα (speîra)
  4. Latinspīra
  5. Englishspiro-
  6. Englishannulated
  7. English todayspiro-annulated

From spiro- + annulated.

Etymology from Wiktionary, CC BY-SA 4.0.