hydronium

noun hy·dro·ni·um \hī-ˈdrō-nē-əm\

Definition of HYDRONIUM

: a hydrated hydrogen ion H₃O⁺

See hydronium defined for kids

International Scientific Vocabulary hydr- + -onium

First Known Use: 1908

Medical Dictionary

noun hy·dro·ni·um \hī-ˈdrō-nē-əm\

: a hydrated hydrogen ion H₃O⁺

Next Word in the Dictionary: hydronymyPrevious Word in the Dictionary: hydronitrogenAll Words Near: hydronium

What made you want to look up hydronium? Please tell us where you read or heard it (including the quote, if possible).

Put-downs with flair

How to use a word that (literally) drives some people nuts.

Test your vocab with our fun, fast game

Ailurophobia, and 9 other unusual fears