Etymology

hydrazinium

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Today it means: The univalent cation N₂H₅⁺ formed by protonation of hydrazine Full definition →

English hydrazine ← German Hydrazin
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The story

  1. GermanHydrazin
  2. Englishhydrazine
  3. English todayhydrazinium

From hydrazine + -ium.

Etymology from Wiktionary, CC BY-SA 4.0.