[1] : The Collaborative International Dictionary of English v.0.48

ammoniac \ammo"niac\ a^mm=o"ni^a^k, ammoniacal
\am`moni"acal\ a^m`m-onimac".akal, 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 gum ammoniac
see also:
ammoniacal engine sal ammoniac chloride of ammonium muriate of ammonia 

[2] : WordNet (r) 2.0

ammoniacal
     adj : pertaining to or containing or similar to ammonia syn: ammoniac
see also:
ammoniac 

Ammoniacal >> A Words
Ammoniacal, definition of term: Ammoniacal
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