from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Tetralogy of Fallot.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a congenital heart defect producing cyanosis; characterized by four symptoms: pulmonary stenosis and ventricular septal defect and malposition of the aorta over both ventricles and hypertrophy of the right ventricle
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