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semilunar valve

The definition of a semilunar valve is either the pulmonary valve or the aorta valve.

(noun)

An example of a semilunar valve is one of the crescent-shaped heart valves that keep blood from flowing back into the ventricles.

See semilunar valve in Webster's New World College Dictionary

either of two crescent-shaped heart valves, one, a pulmonary valve, at the junction of the right ventricle and pulmonary artery, the other, an aortic valve, at the junction of the left ventricle and aorta, which keep blood from flowing back into the ventricles

See semilunar valve in American Heritage Dictionary 4

noun

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 medical definition

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