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Definition of Aortic valve
1. Noun. A semilunar valve between the left ventricle and the aorta; prevents blood from flowing from the aorta back into the heart.
Generic synonyms: Semilunar Valve
Medical Definition of Aortic valve
1. The heart valve that divides the left ventricle and the aorta. The aortic valve opens during left ventricular contraction and then closes to prohibit the backwash of oxygenated blood from the aorta into the ventricle. The aortic valve has 3 valve cusps. (27 Sep 1997)