semilunar

semilunar /semi·lu·nar/ (-loo´nahr) resembling a crescent or half-moon.

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sem·i·lu·nar (sm-lnr, sm-) or sem·i·lu·nate (-lnt)

adj.

Shaped like a half-moon; crescent-shaped; lunar.

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semilunar

shaped like a half-moon or crescent.

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semilunar valve

valve guarding the entrances into the aorta and pulmonary trunk from the cardiac ventricles.

semilunar valve anomaly

abnormal development causes an irregular central perforation of the valve and the signs of valvular stenosis.