Ammonia

n. colorless soluble gas (Chemistry)

Ammonia is a compound with the formula NH₃. It is normally encountered as a gas with a characteristic pungent odor. Ammonia contributes significantly to the nutritional needs of the planet as a precursor to foodstuffs and fertilizers. Ammonia, either directly or indirectly, is a building block for the synthesis of most pharmaceuticals. Although it is in wide use, ammonia is caustic and hazardous.
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Ammonia /am·mo·nia/ a colorless alkaline gas with a pungent odor and acrid taste, NH3. Ammonia labeled with 13N is used in positron emission [more]Ammonia - Community and Resources

Noun
1. a pungent gas compounded of nitrogen and hydrogen (NH3)
(hypernym) binary compound
(hyponym) ammonium, ammonium ion
(derivation) ammoniate
2. a water solution of ammonia
(synonym) ammonia water, ammonium hydroxide
(hypernym) liquid
(derivation) ammoniate

v. ammoniate, produce a compound which contains ammonia