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hydronium ion

American  
[hahy-droh-nee-uhm ahy-uhn, ahy-on] / haɪˈdroʊ ni əm ˌaɪ ən, ˌaɪ ɒn /

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.

hydronium ion British  
/ haɪˈdrəʊnɪəm /

noun

  1. chem another name for hydroxonium ion

"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

Etymology

Origin of hydronium ion

First recorded in 190510; < German Hydronium, contraction of Hydroxonium; hydro- 2, oxonium compound

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.