The term "Subtonic" refers to which scale degree?

The term "Subtonic" specifically refers to the seventh scale degree in the natural minor scale. In the context of music theory, the subtonic is one whole step below the tonic (the first degree of the scale). In a natural minor scale, this degree is traditionally identified as a major seventh and serves as a crucial component in understanding the scale's structure and the harmonies derived from it.

This terminology is distinct from the other scale degrees. For instance, the first degree is referred to as the tonic, the fourth degree as the subdominant, and the fifth degree as the dominant. Each of these degrees has its own function within the scale, but the subtonic specifically relates to the seventh degree in a natural minor context, reinforcing its role in the overall sound and progression of the scale. Furthermore, the subtonic’s major quality contributes significantly to the tonality and harmonic progressions found in minor compositions.