1.  heart valve(n = noun.body) cardiac valve - a valve to control one-way flow of blood;
is a kind of valve
is a part of heart, pump, ticker
has parts: cusp, leaflet
has particulars: atrioventricular valve, semilunar valve

2.  heart valve(n = noun.artifact) - an implant that replaces a natural cardiac valve;
is a kind of implant

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