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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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Word History and Origins
Origin of semilunar valve1
First recorded in 1710–20
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Example Sentences
The nostrils are two semilunar valve-like slits at the apex of the muzzle.
From Project Gutenberg
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