bull tongue: a heavy plow with a single wide blade; used chiefly in cotton fields
object: a tangible and visible entity; an entity that can cast a shadow
tetralogy of fallot: 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