submediant

n.(music) the sixth note of a major or minor scale (or the third below the tonic)

The Submediant Complex: Its Musical and Poetic Roles in Schubert's Songs
On the Typical Application of the Submediant in the Improvisational Accompaniment
Axis Tonality and Submediant in the Music of Shostakovich
Pitch-class motive in the songs of Franz Schubert : the submediant complex /
Closely related key
Apparatus and method for pitch training
Music display device and method
Music magic circular calculator
Neuromagnetic responses to chords are modified by preceding musical scale.
Harmonic duality : from interval ratios and pitch distance to spectra and sensory dissonance