Meaning of decongestant

de•con•ges•tant

Pronunciation: (dē"kun-jes'tunt), [key]
— Pharm. Pharm.
—adj.
  1. of or pertaining to a substance that relieves mucus congestion of the upper respiratory tract.
—n.
  1. any such substance.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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