What does ditone mean?
A ditone is a musical interval spanning two whole tones — that is, four semitones — and corresponds closely to what modern musicians call a major third. The term belongs chiefly to the vocabulary of music theory, especially in discussions of ancient Greek and medieval systems of tuning. In those traditions, the ditone was not identical to today's major third: built by stacking two pure whole tones, it comes out slightly larger than the equal-tempered version, producing the characteristic bright but tense sonority that early theorists sometimes treated with suspicion. The word derives from Greek roots meaning 'two tones,' making its structure transparent: di- ('two') plus tone. Although rare outside scholarly contexts, the ditone remains useful for anyone exploring the history of harmony, since it captures precisely how pre-modern thinkers measured and conceptualized intervals before the standardization of twelve-tone equal temperament.
nounIn music theory, an interval consisting of two whole tones (four semitones), equivalent to a major third in modern tuning; in Pythagorean tuning it differs slightly from the equal-tempered major third.
- An interval of two whole tones, historically significant in Greek and medieval music theory and slightly narrower than the modern equal-tempered major third.
"The ditone was central to medieval theorists' descriptions of consonance and dissonance."
"Boethius explained how stacking two tones produces the interval known as the ditone."
"In Pythagorean tuning, the ditone measures about 408 cents, noticeably wider than the equal-tempered major third's 400 cents."
Standard plural, used when discussing multiple such intervals across different tunings or theoretical systems.
"Theorists compared the ditones of Pythagorean and just intonation side by side."
The 'dissonant thirds' that medieval musicians once distrusted were called ditones — two whole tones stacked, just shy of today's sweet major third.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of ditone
The word ditone comes from the Greek dítonos (δίτονος), meaning 'of two tones,' formed from di- ('two') and tónos ('tone, stretching'). It entered Latin as ditonus and passed into English through medieval Latin musical treatises during the Middle Ages. It shares its Greek root with related terms such as monotone, semitone, and tonic, all of which descend from the same notion of tonal measurement.
How ditone is actually used
A technical term used mainly in historical, theoretical, or academic discussions of music; it rarely appears in everyday speech. It carries no emotional connotation and is essentially neutral in register, though it signals specialist knowledge.
Easily confused with ditone
A semitone is a half step (the smallest interval in Western tuning), while a ditone spans two full whole tones — four times as large.