tri·cus·pid
(ˌ)trī-ˈkə-spəd 
1
: having three cusps
a tricuspid molar
2
: of, relating to, or involving the tricuspid valve of the heart
tricuspid regurgitation
: a tricuspid anatomical structure having three projections: such as
a
: a tooth having three cusps
b
Examples of tricuspid in a Sentence
Recent Examples on the Web
Tony Dajer, Discover Magazine, 18 June 2022
From pre-op to last day, the size of Asjia’s heart decreased drastically, her pressure levels went back to normal, the mitral and tricuspid valves were functioning properly and there was no more valve leakage, said her surgeon Dr. Hani Najim.
—Nick Moyle, ExpressNews.com, 8 Aug. 2020
Charlotte Phillipp, PEOPLE, 10 Oct. 2025
When the tricuspid and mitral valves close, the ventricles squeeze (contract) and pump blood.
—Colleen Doherty, Verywell Health, 2 Dec. 2024
In addition to the aortic valve, there are three others: the mitral, the tricuspid and the pulmonary.
—Marlene Cimons, Washington Post, 10 June 2018
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Adjective
At systole, when the heart contracts, the valves at the bases of the great vessels (pulmonic and aortic) open, while those between the atria and ventricles (tricuspid and mitral) close.
—Tony Dajer, Discover Magazine, 18 June 2022
From pre-op to last day, the size of Asjia’s heart decreased drastically, her pressure levels went back to normal, the mitral and tricuspid valves were functioning properly and there was no more valve leakage, said her surgeon Dr. Hani Najim.
—Nick Moyle, ExpressNews.com, 8 Aug. 2020
Noun
Ten days later, the couple revealed she was diagnosed with tricuspid atresia.
—Charlotte Phillipp, PEOPLE, 10 Oct. 2025
When the tricuspid and mitral valves close, the ventricles squeeze (contract) and pump blood.
—Colleen Doherty, Verywell Health, 2 Dec. 2024
In addition to the aortic valve, there are three others: the mitral, the tricuspid and the pulmonary.
—Marlene Cimons, Washington Post, 10 June 2018
Cite this Entry
“Tricuspid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tricuspid. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
tricuspid
1 of 2 adjective
tri·cus·pid
(ˈ)trī-ˈkəs-pəd
1
: having three cusps
tricuspid molars
2
: of, relating to, or involving the tricuspid valve of the heart
tricuspid disease
tricuspid
2 of 2 noun
: a tricuspid anatomical structure
especially
: a tooth having three cusps
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