[ uh-mohn-yuh, uh-moh-nee-uh ]
/ əˈmoʊn yə, əˈmoʊ ni ə /

noun Chemistry.

a colorless, pungent, suffocating, highly water-soluble, gaseous compound, NH3, usually produced by the direct combination of nitrogen and hydrogen gases: used chiefly for refrigeration and in the manufacture of commercial chemicals and laboratory reagents.
Also called ammonia solution, ammonia water, aqua ammoniae, aqua ammonia, aqueous ammonia. this gas dissolved in water; ammonium hydroxide.

Origin of ammonia

1790–1800; < New Latin, so called as being obtained from sal ammoniac. See ammoniac Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for ammonia

British Dictionary definitions for ammonia

/ (əˈməʊnɪə, -njə) /


a colourless pungent highly soluble gas mainly used in the manufacture of fertilizers, nitric acid, and other nitrogenous compounds, and as a refrigerant and solvent. Formula: NH 3
a solution of ammonia in water, containing the compound ammonium hydroxide

Word Origin for ammonia

C18: from New Latin, from Latin (sal) ammōniacus (sal) ammoniac 1
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

Medical definitions for ammonia

[ ə-mōnyə ]


A colorless, pungent gas used to manufacture a wide variety of nitrogen-containing organic and inorganic chemicals.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for ammonia

[ ə-mōnyə ]

A colorless alkaline gas that is lighter than air and has a strongly pungent odor. It is used as a fertilizer and refrigerant, in medicine, and in making dyes, textiles, plastics, and explosives. Chemical formula: NH3.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.