from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A musical interval of the Western twelve-semitone system consisting of nine semitones and spanning six degrees of the diatonic scale. It is one semitone wider than a minor sixth and enharmonically equivalent to a diminished seventh.
from the GNU version of the Collaborative International Dictionary of English
- a sixth of four steps and a half step. In major keys the third and sixth from the key tone are major. Major keys and intervals, as distinguished from minors, are more cheerful.
Sorry, no etymologies found.