noun Pharmacology.

  1. an alkaloid, C17H17NO2, derived from morphine and used as a fast-acting emetic.


  1. a white crystalline alkaloid, derived from morphine, that is used medicinally as an emetic, as an expectorant, and in Parkinson’s disease. Formula: C 17 H 17 NO 2


  1. A poisonous, white, crystalline alkaloid derived from morphine and used medicinally to induce vomiting.

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