Meaning of cromolyn sodium

cro'mo•lyn so'dium

Pronunciation: (krō'mu-lin), [key]
— Pharm. Pharm.
  1. a substance, CHNaO, used as a preventive inhalant for bronchial asthma and hay fever.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.