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Definition of ammoniac


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am·mo·ni·ac2  audio  (-mn-k) KEY 

NOUN:
A strong-smelling gum resin from the stems of a plant (Dorema ammoniacum) of western Asia, formerly used in perfumery and in medicine as an expectorant and a stimulant. Also called gum ammoniac.

ETYMOLOGY:
Middle English ammoniak, from Latin ammniacum, from Ammniacus, of Amen, from Greek Ammniakos ; see ammonia


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