- tetralogy of Fallot, Fallot's tetralogy, Fallot's syndrome - 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
--1 is a kind of congenital heart defect; syndrome
--1 has parts: pulmonary stenosis; ventricular septal defect