ammonium am·mo·ni·um (ə-mō'nē-əm)
The univalent radical NH4+, that is derived from ammonia and that reacts as a univalent metal in forming ammonium compounds.
|ammonium (ə-mō'nē-əm) Pronunciation Key
A positively charged ion, NH4, derived from ammonia and found in a wide variety of organic and inorganic compounds. Compounds of ammonium chemically resemble the alkali metals.