General English

  • noun a strong poisonous gas or liquid used in cleaning products


  • noun a gas with an unpleasant smell that is easily soluble in water.


  • A highly efficient, inexpensive gas used in manufacturing fertilizers and as a coolant in large refrigeration systems such as ice rinks.


  • A pungent irritating gas used in water solution as a cleaner and bleach. Often smelled on rotting fish and overripe cheese.



  • noun a gas with a strong smell, which is a compound of nitrogen and hydrogen and is used to make artificial fertilisers, or in liquid form as a refrigerant.

Origin & History of “ammonia”

Ammonia gets its name ultimately from Amon, or amen, the Egyptian god of life and reproduction. near the temple of Amon in Libya were found deposits of ammonium chloride, which was hence named sal ammoniac – ‘salt of Amon’. The gas nitrogen hydride is derived from sal ammoniac, and in 1782 the Swedish chemist Torbern Bergman coined the term ammonia for it.