- 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: NH3
- a solution of ammonia in water, containing the compound ammonium hydroxide
WordReference Random House Learner's Dictionary of American English © 2026
am•mo•nia /əˈmoʊnyə/USA pronunciation
n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2026- Chemistrya colorless, strong-smelling gas or liquid, used chiefly for cleaning, refrigeration, and explosives.
am•mo•nia
(ə mōn′yə, ə mō′nē ə),USA pronunciation n. [Chem.]
- Chemistrya 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.
- ChemistryAlso called ammonia solution, ammonia water, aqua ammoniae, aqua ammonia, aqueous ammonia. this gas dissolved in water;
ammonium hydroxide.
- Neo-Latin, so called as being obtained from sal ammoniac. See ammoniac
- 1790–1800
Collins Concise English Dictionary © HarperCollins Publishers::
ammonia /əˈməʊnɪə; -njə/ n
'ammonia' also found in these entries (note: many are not synonyms or translations):
amine
- ammoniacal
- ammoniate
- ammonify
- ammonium hydroxide
- aqueous
- atomic clock
- Bosch
- cyanic acid
- fumed
- Haber process
- hartshorn
- hydrazine
- hydrogen
- hydrogen cyanide
- melamine
- nitrogen
- orchil
- Ostwald
- paregoric
- sal volatile
- Solvay process
- spirits of ammonia
- spirits of hartshorn
- synthesis gas
- urea
- water
- adenosine deaminase
- aluminum ammonium sulfate
- amide
- ammine
- ammonia alum
- ammonia liquor
- ammonia solution
- ammonia water
- ammonic
- ammonification
- ammonio-
- ammonium
- ammonium nitrate
- ammono
- ammonolysis
- aqua ammoniae
- aqueous ammonia
- aromatic spirits of ammonia
- arylamine
- asparaginase
- Bakelite
- base
- casein