Etymology

isoquinolinium

I1S1O1Q10U1I1N1O1L1I1N1I1U1M3

Today it means: The cation formed by protonation of an isoquinoline Full definition →

English quinoline ← Ancient Greek ῐ̓́σος (ĭ́sos)
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The story

  1. Ancient Greekῐ̓́σος (ĭ́sos)
  2. Englishiso-
  3. Englishquinine
  4. Englishquinoline
  5. English todayisoquinolinium

From iso- + quinolinium or isoquinoline + -ium.

Etymology from Wiktionary, CC BY-SA 4.0.