am·mo·ni·um ( -m  n -m)n. The univalent chemical ion NH4+, derived from ammonia, whose compounds chemically resemble the alkali metals. |
ammonium [əˈməʊnɪəm -njəm]
n
(Chemistry) (modifier) of, consisting of, or containing the monovalent group NH4- or the ion NH4+ ammonium compounds
| ammonium (-mn-m) 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. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | ammonium - the ion NH4 derived from ammonia; behaves in many respects like an alkali metal ion ammonia - a pungent gas compounded of nitrogen and hydrogen (NH3) |
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