a salt formed by the reaction of an acid with an organic compound containing a basic oxygen atom.
Origin of oxonium compound
ox- + New Latin -onium (abstracted from ammonium)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
chem any of a class of salts derived from certain organic ethers or alcohols by adding a proton to the oxygen atom and thus producing a positive ion (oxonium 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