Having three cusps, or points; tricuspidate; as, a tricuspid molar.

Of or pertaining to the tricuspid valves; as, tricuspid obstruction.

Having three flaps or cusps. The valve that is called the tricuspid valve is situated between the right atrium and right ventricle and permits blood to flow only from the atrium into the ventricle. The aortic valve in the heart also has three cusps. See the entire definition of Tricuspid