The Collaborative International Dictionary
Tricuspid \Tri*cus"pid\, a. [L. tricuspis, -idis; tri- (see Tri-) + cuspis a point: cf. F. tricuspide.]
Having three cusps, or points; tricuspidate; as, a tricuspid molar.
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(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.
Wiktionary
n. A heart valve with three cusps which prevents backflow of blood from the right ventricle into the right atrium.
WordNet
n. valve with three cusps; situated between the right atrium and the right ventricle; allows blood to pass from atrium to ventricle and closes to prevent backflow when the ventricle contracts [syn: right atrioventricular valve]
Wikipedia
The tricuspid valve, or right atrioventricular valve, is on the right dorsal side of the mammalian heart, between the right atrium and the right ventricle. The function of the valve is to prevent back flow of blood into the right atrium.
Usage examples of "tricuspid valve".
Burke exposed the tricuspid valve and began to remove the shredded membrane.