from
The Collaborative International Dictionary of English v.0.48
Tricuspid \Tri*cus"pid\, a. [L. tricuspis, -idis; tri- (see
{Tri-}) + cuspis a point: cf. F. tricuspide.]
1. Having three cusps, or points; tricuspidate; as, a
tricuspid molar.
[1913 Webster]
2. (Anat.) Of or pertaining to the tricuspid valves; as,
tricuspid obstruction.
[1913 Webster]
{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.
[1913 Webster]