nīˈfedə̇ˌpēn, -_pə̇n noun
Etymology: probably ni tr- + -fe- (from phe nyl) + -dipine (alteration & shortening of pyridine )
: a calcium channel blocker C 17 H 18 N 2 O 6 that is a coronary vasodilator used especially in the treatment of angina pectoris