| trilogy | A triad of related entities. Origin: G. Trilogia, fr. Tri-+ logos, study, discourse Trilogy of Fallot, a set of congenital defects including pulmonic stenosis, atrial septal defect, and right ventricular hypertrophy. Synonym: Fallot's triad. (05 Mar 2000) |
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| trilogy of fallot | Combination of pulmonary valve stenosis and atrial septal defect with right ventricular hypertrophy. (12 Dec 1998) |