Definition of tricuspid in English:

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Pronunciation: /trīˈkəspəd/


1Having three cusps or points, in particular.
Example sentences
  • Patients with evident extravascular fluid retention should be diuresed until the disappearance of excess fluid and the normalization of jugular venous pressure (unless tricuspid regurgitation is present).
  • The study was technically limited due to the patient's size and large plasmacytoma in his chest but did show mild aortic stenosis and mild tricuspid and mitral regurgitation.
  • These researchers reported cardiac carcinoid involvement in the form of endocardial fibrosis leading to tricuspid insufficiency.
1.1Denoting a tooth with three cusps or points.
Example sentences
  • Some F 2 teeth are truly tricuspid, like those of LF, whereas others are truly bicuspid, as in MZ.
  • Their tricuspid teeth (three sharp points per tooth) are especially adapted to feed on organisms with hard shells such as clams, snails, crabs and shrimp.
  • Next, we use field data for cichlid species with adult unicuspid, bicuspid, and tricuspid teeth.
1.2Denoting or relating to a valve formed of three triangular segments, particularly that between the right atrium and ventricle of the heart.
Example sentences
  • Deoxygenated blood first enters the right atrium of the heart and enters the right ventricle through the tricuspid valve.
  • The endocardial cushions form the lower atrial septum, the upper ventricular septum, the septal leaflet of the tricuspid valve and the anterior leaflet of the mitral valve.
  • A large mass was identified in the right atrium that extended through the tricuspid valve into the right ventricle almost to the right ventricular apex.


Late 17th century: from tri- 'three' + Latin cuspis, cuspid- 'cusp'.

For editors and proofreaders

Syllabification: tri·cus·pid

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