- a series of four dramas, three tragic and one satirical, performed in sequence at the ancient Athenian festival of Dionysus
- any series of four related plays, novels, etc.
Origin of tetralogyClassical Greek tetralogia: see tetra- and -logy
- A series of four related dramatic, operatic, or literary works.
- Medicine A complex of four symptoms.
Origin of tetralogyGreek tetralogiā tetra- tetra- -logos word, saying ; see -logy .
From tetra- +"Ž -logy.