SEMILUNAR VALVE Definition & Meaning

semilunar valve

noun

Anatomy.

either of two valves, one in the aorta and one in the pulmonary artery, consisting of a set of three crescent-shaped flaps of tissue and serving to prevent blood from flowing back into the heart after contraction.

semilunar valve

noun

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

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51�Թ� History and Origins

Origin of semilunar valve¹

First recorded in 1710–20

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Example Sentences

Examples have not been reviewed.

The openings of the arteries behind the semilunar valves may be very small.

From

The thoracic duct is equal in diameter to a goose-quill, and, at its termination, is provided with a pair of semilunar valves, which prevent the admission of venous blood into its cylinder.

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The semilunar valves of the pulmonary artery and aorta were unusually small, and their bases cartilaginous.

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Just under the mucous membrane covering the anal columns and semilunar valves is the fatty tissue forming a bed upon which the mucous membrane rests.

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The right semilunar valve is situated around the opening of the right ventricle into the pulmonary artery.

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