oxonium-ion

noun Chemistry.

Dictionary.com Unabridged

noun

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

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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What Is Oxonium Ion?

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a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.

a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.

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Collins

World English Dictionary

hydronium ion (haɪˈdrəʊnɪəm)

—n
	chem another name for hydroxonium ion

[C20: from hydro- + (amm)onium]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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oxonium-ion

oxonium ion

hy·dro·ni·um i·on