gum ammoniac : Idioms & Phrases
Ammoniacal engine
- an engine in which the vapor of ammonia is used as the motive force.
Webster 1913
Sal ammoniac
-
noun a white salt used in dry cells
ammonium chloride.
WordNet
L. , the salt usually calledsal ammoniacus chloride of ammonium , and formerlymuriate of ammonia .