Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “ammonium”


noun [U] uk   /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 from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of ammonium?
Add Cambridge dictionaries to your browser to your website

Translations of “ammonium”

Word of the Day


a measure for liquid equal to about half a litre

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More