Assertion: atrioventricular valve's cusp | /r/HasProperty | unicuspid
Facets:
Source sentences:
text: In some cases a valve may only have one cusp (unicuspid) or four cusps (quadricuspid), but this is less common.
text: A normal valve has three parts (leaflets or cusps), but a stenotic valve may have only one cusp (unicuspid) or two cusps (bicuspid), which are thick and stiff, rather than thin and flexible.