Definition of ammoniac
: the aromatic gum resin of a southwest Asian herb (Dorema ammoniacum) of the carrot family used as an expectorant and stimulant and in plasters
Origin of ammoniac
Middle English & Latin; Middle English, from Latin ammoniacum, from Greek ammōniakon, from neuter of ammōniakos of Ammon
First Known Use: 15th century
Learn More about ammoniac
Medical Dictionary: Definition of "ammoniac"
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