| Answer | Crossword Clue |
|---|---|
| sesquitertias | SESQUITERTIA, a perfect fourth; a rhythm of three notes against four |
| sesquitertia | a perfect fourth; a rhythm of three notes against four |
| tetrachord | A scale of four notes, the interval between the first and last being a perfect fourth |
| tetrachords | A scale of four notes, the interval between the first and last being a perfect fourth |
| fourths | An interval spanning four consecutive notes in a diatonic scale, in particular (also perfect fourth) an interval of two tones and a semitone (e.g., C to F) |
