Etymology

-onic

Today it means: Used to form the names of acids derived from aldoses by the oxidation of the aldehyde group (e.g., gluconic acid). Full definition →

English ketone ← German Keton
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The story

  1. GermanKeton
  2. Englishketone
  3. English today-onic

From -one + -ic.

Etymology from Wiktionary, CC BY-SA 4.0.