(chemistry) An ammonium group in which each hydrogen has been replaced by an alkyl or aryl group

(paleontology) Any of an extinct group of cephalopods of the subclass Ammonoidea; a fossil shell of such an animal.

An explosive prepared from a mixture of TNT and ammonium nitrate; a form of amatol, popular in Eastern Europe and China.

(organic chemistry) A compound formed by the ethoxylation of ammonium lauryl sulfate, having properties similar to sodium laureth sulfate.

Pertaining to or containing ammonia.

(organic chemistry, in combination) A chemical group (-NH₃⁺) derived from the ammonium cation.

(transitive) To treat with ammonia.

(inorganic chemistry) Any compound containing ammonia bound as a ligand.

plural of ammonium imine

Of or relating to ammonia, or possessing its properties.