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Definition of ammonium noun from the Oxford Advanced Learner's Dictionary

ammonium

noun

/əˈməʊniəm/

/əˈməʊniəm/

[uncountable] (chemistry)

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an ion made from ammonia containing nitrogen and hydrogen together with another element
Word Originearly 19th cent.: from ammonia + -ium.

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See ammonium in the Oxford Advanced American Dictionary

Check pronunciation: ammonium

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noun

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B2

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