Tritone (Lat. tritonus)
- William Drabkin
The Interval equal to the sum of three whole tones. In equal temperament it is exactly half an octave and can therefore be perceived either as an augmented 4th or a diminished 5th. Since the beginnings of polyphony in the early Middle Ages theorists and composers have changed their attitudes to the tritone and its use more than to any other interval....