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/ˈoʊniəm/ · noun
(chemistry) Any cation derived by the addition of a proton to the hydride of any element of the nitrogen, chalcogen or halogen families..
Use onium when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Onium means (chemistry) Any cation derived by the addition of a proton to the hydride of any element of the nitrogen, chalcogen or halogen families..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use onium where its definition matches the intended context.
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