ammonium

noun Chemistry.

1. the univalent ion, NH4+, or group, NH4, which plays the part of a metal in the salt formed when ammonia reacts with an acid.

noun

1. (modifier) of, consisting of, or containing the monovalent group NH 4 – or the ion NH 4 +ammonium compounds

n.

1. The univalent radical NH4+, that is derived from ammonia and that reacts as a univalent metal in forming ammonium compounds.

1. 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.