from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of, containing, or similar to ammonia.
  • n. 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.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of, pertaining, or containing ammonia, or possessing its properties
  • n. The concrete juice (gum resin) of an umbelliferous plant, the Dorema ammoniacum. It is brought chiefly from Persia in the form of yellowish tears, which occur singly, or are aggregated into masses. It has a peculiar smell, and a nauseous, sweet taste, followed by a bitter one. It is inflammable, partially soluble in water and in spirit of wine, and is used in medicine as an expectorant and resolvent, and for the formation of certain plasters.

from The Century Dictionary and Cyclopedia

  • Pertaining to Ammon, or to his shrine in Libya: only in the phrases, or quasi-compounds, gum ammoniac and sal ammoniac. See etymology, and definitions below.
  • Of, pertaining to, or having the properties of ammonia; ammoniacal.
  • n. Same as gum ammoniac. See above.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. pertaining to or containing or similar to ammonia
  • n. the aromatic gum of the ammoniac plant


from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English ammoniak, from Latin ammōniacum, from Ammōniacus, of Amen, from Greek Ammōniakos; see ammonia.



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