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English definition of “ammonium”

ammonium

noun [U]     /əˈməʊ.ni.əm/ US  /-ˈmoʊ-/ specialized
a type of ion that is derived from ammonia and is contained in chemical compounds of it: ammonium chloride ammonium nitrateSpecific chemicals, chemical compounds and gasesSubstances and structures in the bodyTypes of chemical
(Definition of ammonium noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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