Search Result for "atrioventricular valve":
Wordnet 3.0

NOUN (1)

1. either of two heart valves through which blood flows from the atria to the ventricles; prevents return of blood to the atrium; 



WordNet (r) 3.0 (2006):

atrioventricular valve
    n 1: either of two heart valves through which blood flows from
         the atria to the ventricles; prevents return of blood to
         the atrium