semilunar valve


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to semilunar valve: Pulmonary semilunar valve, Aortic semilunar valve

sem·i·lu·nar valve

[TA]
a heart valve composed of a set of three semilunar cusps (valvules); hence both the aortic and pulmonary valves are semilunar valves.
Synonym(s): valvula semilunaris [TA]

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.

semilunar valve

[-lo̅o̅′nər]
Etymology: L, semi + luna, moon, valva, folding door
1 a valve with half-moon-shaped cusps, such as the aortic valve and the pulmonary valve.
2 any one of the cusps constituting such a valve.
3 simple cuplike valves found in the venous and lymphatic vessels. See also heart valve, mitral valve, tricuspid valve.
enlarge picture
Semilunar valves

sem·i·lu·nar valve

(sem'ē-lū'năr valv) [TA]
A heart valve composed of a set of three semilunar cusps (valvules); hence, both the aortic and pulmonary valves are semilunar valves.

semilunar valve

either of the heart valves
  1. (a) at the orifice of the pulmonary artery, or
  2. (b) at the orifice of the aorta. Each consists of three flaps which ensure that blood flows in only one direction.

semilunar

shaped like a half-moon or crescent.

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.
References in periodicals archive ?
Anatomically, the most favorable patients for trans-catheter occlusion are those with small defects situated midway between the pulmonary artery bifurcation and the semilunar valves, away from the left coronary artery ostium and the semilunar valves (4, 7, 8).