Tri·cus·pid a.
 1. Having three cusps, or points; tricuspidate; as, a tricuspid molar.
 2. Anat. Of or pertaining to the tricuspid valves; as, tricuspid obstruction.
 Tricuspid valve Anat., the valve, consisting of three triangular membranous flaps, at the opening of the right auricle into the right ventricle in the heart of most mammals; -- sometimes called the tricuspid valves, each flap being regarded as a valve.

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