| a preparation for smelling, essentially of ammonium carbonate with some agreeable scent, used as a stimulant and restorative. |

| smell·ing salts (směl'ĭng) pl.n. (used with a sing. or pl. verb) Any of various preparations of ammonium carbonate and perfume, sniffed as a restorative or stimulant especially to relieve faintness and headache. |
smelling salts pl.n.
Any of various preparations of ammonium carbonate and perfume, sniffed as a restorative or stimulant especially to relieve faintness and headache.