Sonja is a fictional character from the Underworld series of films. This character is the daughter of the vampire elder Viktor, introduced by flashback, in Underworld. Red Sonja, the She-Devil with a Sword, is a fictional character who first appeared in Conan the Barbarian #23 (Marvel Comics).
tetralogy (plural tetralogies) 1  A set of four works of art that are connected, and that can be seen either as a single work or as four individual works. They are commonly found in literature, film, or video games. ( 2 medicine) A combination of four symptoms.
It is a congenital defect, meaning the baby is born with it. Tetralogy of Fallot is made up of the following four defects of the heart and its blood vessels: 1  A hole in the wall between the two lower chambersâor ventricles âof the heart. 2  This condition also is called a ventricular septal defect.