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hydronium ion

[hahy-droh-nee-uh m] /haɪˈdroʊ ni əm/
noun
1.
the hydrogen ion bonded to a molecule of water, H 3 O + , the form in which hydrogen ions are found in aqueous solution.
Also called oxonium ion.
Origin
< German Hydronium (1907), contraction of Hydroxonium; see hydro-2, oxonium ion
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for hydronium ion

hydronium ion

/haɪˈdrəʊnɪəm/
noun
1.
(chem) another name for hydroxonium ion
Word Origin
C20: from hydro- + (amm)onium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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