the univalent ion, NH 4+ , or group, NH 4 , which plays the part of a metal in the salt formed when ammonia reacts with an acid.
Origin
< Neo-Latin; see ammonia, -ium; coined by J. J. Berzelius in 1808
Examples from the web for ammonium
Today roughly half the nitrogen atoms in an average human body have come through an ammonium factory.
ammonium hydroxide is a colorless liquid chemical solution that forms when ammonia dissolves in water.
While a cargo ship was being loaded with ammonium nitrate, a fire began which forced the nitrate to explode.
Producers add sulfuric acid to form phosphoric acid, which is later converted to ammonium phosphate.
ammonium bicarbonate is used in digestive biscuit manufacture.
British Dictionary definitions for ammonium
ammonium
/əˈməʊnɪəm; -njəm/
noun
1.
(modifier) of, consisting of, or containing the monovalent group NH4– or the ion NH4+: ammonium compounds
ammonium in Medicine
ammonium am·mo·ni·um (ə-mō'nē-əm) n. The univalent radical NH4+, that is derived from ammonia and that reacts as a univalent metal in forming ammonium compounds.
ammonium in Science
ammonium
(ə-mō'nē-əm) 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.