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aortic ostium

n.

The opening from the left ventricle of the heart into the ascending aorta, guarded by the aortic valve.

Nearby words

aortic bulb, aortic foramen, aortic insufficiency, aortic murmur, aortic notch, aortic ostium, aortic plexus, aortic septal defect, aortic sinus, aortic stenosis, aortic valve
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.