hydronium ion

[hahy-droh-nee-uh m]
noun
  1. the hydrogen ion bonded to a molecule of water, H3O+, the form in which hydrogen ions are found in aqueous solution.

Origin of hydronium ion

< German Hydronium (1907), contraction of Hydroxonium; see hydro-2, oxonium ion
Also called oxonium ion.
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British Dictionary definitions for hydronium ion

hydronium ion

noun
  1. chem another name for hydroxonium ion

Word Origin for hydronium ion

C20: from hydro- + (amm) onium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012