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onium compound

British

/ ˈəʊnɪəm /

noun

chem any salt in which the positive ion ( onium ion ) is formed by the attachment of a proton to a neutral compound, as in ammonium, oxonium, and sulphonium compounds

"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 onium compound

C20: from ( _amm ) _onium

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