D defs.my
Entry 2 senses Webster, 1913

Tricuspid

/trīk-ŭs'-pəd/ · Tri·cus·pid · IPA /tɹaɪˈkʌspɪd/
01 a. Having three cusps, or points; tricuspidate; as, a tricuspid molar.
  1. 1.
    Having three cusps, or points; tricuspidate; as, a tricuspid molar.
  2. 2.
    Of or pertaining to the tricuspid valves; as, tricuspid obstruction.(Anat.)
Phrases & compounds
Tricuspid valve — 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.