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gum ammoniac

noun
1.
a brownish-yellow gum resin, having an acrid taste, occurring in tearlike fragments from a plant, Dorema ammoniacum, of western Asia: used in porcelain ceramics and in medicine as an expectorant and counterirritant.
Also called ammoniac, ammoniacum.
Origin
1350-1400
1350-1400; Middle English

ammoniac

[uh-moh-nee-ak] /əˈmoʊ niˌæk/
noun
1.
Also, ammoniacum
[am-uh-nahy-uh-kuh m] /ˌæm əˈnaɪ ə kəm/ (Show IPA)
. 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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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ammoniacum

ammoniac1

/əˈməʊnɪˌæk/
adjective
1.
a variant of ammoniacal

ammoniac2

/əˈməʊnɪˌæk/
noun
1.
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 Also called gum ammoniac
Word Origin
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)

gum ammoniac

noun
1.
another name for ammoniac2
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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ammoniacum in Medicine

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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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