ammoniac
noun
am·mo·ni·ac ə-ˈmō-nē-ˌak 
: the aromatic gum resin of a southwest Asian herb (Dorema ammoniacum) of the carrot family used as an expectorant and stimulant and in plasters
Word History
Etymology
Middle English & Latin; Middle English, from Latin ammoniacum, from Greek ammōniakon, from neuter of ammōniakos of Ammon
First Known Use
15th century, in the meaning defined above
Phrases Containing ammoniac
Medical Definition
ammoniac 1 of 2
noun
am·mo·ni·ac ə-ˈmō-nē-ˌak
: the aromatic gum resin of a Persian herb (Dorema ammoniacum) of the carrot family used as an expectorant and stimulant and in plasters
ammoniac
2 of 2 see sal ammoniac