hydronium

noun
hy·​dro·​ni·​um | \hī-ˈdrō-nē-əm \

Definition of hydronium 

: a hydrated hydrogen ion H3O+

First Known Use of hydronium

1908, in the meaning defined above

History and Etymology for hydronium

International Scientific Vocabulary hydr- + -onium

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The first known use of hydronium was in 1908

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hydronium

noun
hy·​dro·​ni·​um | \hī-ˈdrō-nē-əm \

Medical Definition of hydronium 

: a hydrated hydrogen ion H3O+

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