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nounwhite odorless powdered or crystalline alkaloid from plants of the genus Ephedra (especially Ephedra sinica) or made synthetically; used as a bronchodilator to treat bronchitis and asthmatype of:
Definition that contains ephedrine
- pseudoephedrine poisonous crystalline alkaloid occurring with ephedrine and isomorphic with it
- ephedra sinica Chinese ephedra yielding ephedrine
- mahuang Chinese ephedra yielding ephedrine