| a water-soluble mixture of ammonium bicarbonate and ammonium carbamate, occurring either as a white powder or in colorless, hard, crystalline masses: used chiefly in the manufacture of smelling salts and baking powder. |

| ammonium carbonate n.
|
ammonium carbonate n.
A carbonate of ammonium.
The double salt of ammonium bicarbonate and ammonium carbamate, produced commercially and used in powder form in smelling salts.