noun Pharmacology.
- a white, crystalline, nonnarcotic, alkaloidal powder, C20H21NO4, obtained from opium, but not a morphine derivative and not habit-forming or addicting, used in the treatment of spasms of involuntary muscle, especially of the stomach, bronchi, and arteries.
noun
- a white crystalline almost insoluble alkaloid found in opium and used as an antispasmodic to treat coronary spasms and certain types of colic. Formula: C 20 H 21 NO 4
n.
- A nonaddictive opium derivative used medicinally to relieve spasms of smooth muscle.