Semilunar valves

Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to Semilunar valves: cardiac cycle, tricuspid valve
(Anat.) the valves at the beginning of the aorta and of the pulmonary artery which prevent the blood from flowing back into the ventricle.

See also: Semilunar

References in periodicals archive ?
A study of autopsy specimens of normal hearts concluded that, in both genders, all indexed mean valve circumferences progressively increased throughout adult life, and this trend was greater for the semilunar valves than the atrioventricular valves.
These pressures, created by the contraction of cardiac muscle in the ventricle walls, control the opening and closing of the semilunar valves and thus the movement of blood from the left and right ventricles into the aorta and pulmonary trunk.
The earliest anlage of the semilunar valves was first observed in 2.