noun. The univalent chemical ion NH₄+, derived from ammonia, whose compounds chemically resemble the alkali metals.

noun. A name given to the hypothetical base (NH₄) of ammonia, analogous to a metal, as potassium. .

noun. A compound radical, NH4, having the chemical relations of a strongly basic element like the alkali metals.

noun. The univalent NH4+ cation, derived by the protonation of ammonia.

noun. the ion NH4 derived from ammonia; behaves in many respects like an alkali metal ion

"A year later Ampère discovered that nitrogen and hydrogen, when combined in certain proportions to form what he called ammonium, have the same property."

ammonium bases  ammonium bichromate  ammonium carbonate  ammonium chlorid  ammonium chloroplatinate  

ammonia  

harmonium  pandemonium  plutonium  polonium  zirconium  

ammonia  anhydrous  barium  bromide  cadmium