tetralogy
/tɛˈtrælədʒi/
noun
- A group of four related literary, artistic, or musical works, such as novels, plays, or films.
- The author's fantasy tetralogy became a best-selling series worldwide.
- She is writing a tetralogy of historical novels set in ancient Rome.
- The film director planned a tetralogy, with each movie covering a different season.
- A set of four related things, especially in medicine or science.
- The doctor explained the tetralogy of symptoms that often appear together.
- The research paper described a tetralogy of environmental factors leading to the outbreak.
- In biology, the tetralogy of genes controls the development of the limb.