| a white, crystalline, nonnarcotic, alkaloidal powder, C2 0H2 1NO4, obtained from opium, but not a morphine derivative and not habit-forming or addicting, used in the treatment of spasms of involuntary muscle, esp. of the stomach, bronchi, and arteries. |
papaverine pa·pav·er·ine (pə-pāv'ə-rēn', -ər-ĭn)
n.
A nonaddictive opium derivative used medicinally to relieve spasms of smooth muscle.