ammonium Meaning, Definition & Usage

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

WordNet

Am*mo"ni*um noun
Etymology
See Ammonia.
Definitions
  1. (Chem.) A compound radical, NH4, having the chemical relations of a strongly basic element like the alkali metals. positive ion

Webster 1913