am ‧ mo ‧ ni ‧ a /əˈməʊniə $ -ˈmoʊ-/ BrE AmE noun [uncountable]
[ Date: 1700-1800 ; Language: Modern Latin ; Origin: Latin sal ammoniacus 'salt of Amon' , from Amon ancient Egyptian god near one of whose temples the substance was obtained ]
1 . a clear liquid with a strong bad smell that is used for cleaning or in cleaning products
2 . a poisonous gas with a strong bad smell that is used in making many chemicals, ↑ fertilizer s etc