%ammoniacal%

{ } a. Of, pertaining, or containing ammonia, or possessing its properties; as, an ammoniac salt; ammoniacal gas. [ 1913 Webster ]

Ammoniacal engine, an engine in which the vapor of ammonia is used as the motive force. --
Sal ammoniac [ L. sal ammoniacus ], the salt usually called chloride of ammonium, and formerly muriate of ammonia. [ 1913 Webster ]