papillary muscle

English Thesaurus

1. any of several muscles associated with the atrioventricular valves (noun.body)

hypernym	:	cardiac muscle, heart muscle,
definition	:	the muscle tissue of the heart; adapted to continued rhythmic contraction (noun.body)

part meronym	:	atrioventricular valve,
definition	:	either of two heart valves through which blood flows from the atria to the ventricles; prevents return of blood to the atrium (noun.body)