semilunar valve

semilunar valve

n.

Either of two valves, one located at the opening of the aorta and the other at the opening of the pulmonary artery, each consisting of three crescent-shaped cusps and serving to prevent blood from flowing back into the ventricles.

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semilunar valve

n

(Life Sciences & Allied Applications / Anatomy) Anatomy either of two crescent-shaped valves, one in the aorta and one in the pulmonary artery, that prevent regurgitation of blood into the heart

Thesaurus

Noun

1.

semilunar valve - a heart valve with cusps shaped like half-moons; prevents blood from flowing back into the heart aortic valve - a semilunar valve between the left ventricle and the aorta; prevents blood from flowing from the aorta back into the heart pulmonary valve - a semilunar valve between the right ventricle and the pulmonary artery; prevents blood from flowing from the artery back into the heart cardiac valve, heart valve - a valve to control one-way flow of blood