ammoniac

[uh-moh-nee-ak]
noun
1.
Also, ammoniacum [am-uh-nahy-uh-kuhm] . gum ammoniac.
adjective

Origin:
1375–1425; late Middle English armoniac, ammoniak < Latin ammōniacum < Greek ammōniakón (neuter of ammōniakós of Ammon; see -i-, -ac), applied to a salt and a gum resin prepared near the Shrine of Ammon in Libya

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World English Dictionary
ammoniac1 (əˈməʊnɪˌæk)
 
adj
a variant of ammoniacal

ammoniac2 (əˈməʊnɪˌæk)
 
n
Also called: gum ammoniac a strong-smelling gum resin obtained from the stems of the N Asian umbelliferous plant Dorema ammoniacum and formerly used as an expectorant, stimulant, perfume, and in porcelain cement
 
[C14: from Latin ammōniacum, from Greek ammōniakos belonging to Ammon (apparently the gum resin was extracted from plants found in Libya near the temple of Ammon)]

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Medical Dictionary

ammoniac am·mo·ni·ac (ə-mō'nē-āk')
n.
A strong-smelling gum resin from the stems of a plant of western Asia, formerly used in perfumery and in medicine as an expectorant and a stimulant.

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Example sentences
The hiss was explosive and he turned his face from the acrid ammoniac steam.
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