n.an alkaloid medicine (trade name Kavrin) obtained from opium; used to relax smooth muscles; it is nonaddictive
同义词：Kavrin
英汉双解大词典
papaverine/pəˈpeɪvəˌriːn, -rɪn/
1.
N（名词）
a white crystalline almost insoluble alkaloid found in opium and used as an antispasmodic to treat coronary spasms and certain types of colic. Formula: C20H21NO4 罂粟碱