smelling salts

an aromatic mixture of carbonate of ammonium with some fragrant scent, used as an inhalant in relieving faintness, headaches, etc.

See smelling salts in American Heritage Dictionary 4

plural noun (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.

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smelling salts medical definition

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