tetralogy

noun

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. (historical)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.
3. A combination of four symptoms.
4. (colloquial)Tetralogy of Fallot.