| pentalogy | A rarely used term for a combination of five elements, such as five concurrent symptoms. Origin: penta-+ G. Logos, treatise, word (05 Mar 2000) |
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| pentalogy of Cantrell | A type of sternal anomaly associated with midline abdominal defects, a pericardial defect, a cardiac anomaly, and ectopia cordis. (05 Mar 2000) |
| pentalogy of Fallot | Fallot's tetralogy with, in addition, a patent foramen ovale or atrial septal defect. (05 Mar 2000) |