Etymology

conrotatory

C3O1N1R1O1T1A1T1O1R1Y4

Today it means: Describing an electrocyclic reaction in which the substituents at the interacting termini of the conjugated system both rotate in the same sense Full definition →

English rotatory ← Middle English con- ← Latin con-
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The story

  1. Old Frenchcon-
  2. Proto-Indo-European*ḱe?
  3. Proto-Indo-European*ḱóm
  4. Proto-Italic*kom
  5. Proto-Italic*kom-
  6. Latincon-
  7. Middle Englishcon-
  8. Englishcon-
  9. Englishrotatory
  10. English todayconrotatory

From con- + rotatory.

Etymology from Wiktionary, CC BY-SA 4.0.