Found 2 items, similar to AMMONIUM.
English → English (WordNet) Definition: ammonium ammonium n : the ion NH4 derived from ammonia; behaves in many respects like an alkali metal ion [syn: ammonium ion]
English → English (gcide) Definition: Ammonium Ammonium \Am*mo"ni*um\, n. [See Ammonia.] (Chem.) A compound radical, NH4, having the chemical relations of a strongly basic element like the alkali metals. [1913 Webster]