Definition of semilunar valve in US English:

semilunar valve


  • Each of a pair of valves in the heart, at the bases of the aorta and the pulmonary artery, consisting of three cusps or flaps which prevent the flow of blood back into the heart.

    • ‘To assess valvular incompetence colour-Doppler technique was carried out, as it reveals a systolic regurgitant jet across atrio-ventricular valves and a diastolic one across semilunar valves.’
    • ‘The ventricular septum and the atrioventricular and semilunar valves were unremarkable.’