* * *aortic valve n the semilunar valve separating the aorta from the left ventricle that prevents blood from flowing back into the left ventricle
* * *a valve in the heart, lying between the left ventricle and the aorta. It consists of three pockets, shaped like half-moons, that prevent blood returning to the ventricle from the aorta. See also semilunar valve.
Medical dictionary. 2011.
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