/ Dictionary / Index A aortic insufficiency: Meaning and Definition of Find definitions for: aor'tic insuffi'ciency Pronunciation: [key] — Pathol. Pathol. abnormal closure of the aortic valve resulting in regurgitation of blood to the left ventricle. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aortic arch aortic stenosis Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language