Wordnet 3.0
NOUN (1)
1.
(music) the sixth note of a major or minor scale (or the third below the tonic);
The Collaborative International Dictionary of English v.0.48:
Submediant \Sub*me"di*ant\, n. (Mus.)
The sixth tone of the scale; the under mediant, or third
below the keynote; the superdominant.
[1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Superdominant \Su`per*dom"i*nant\, n. (Mus.)
The sixth tone of the scale; that next above the dominant; --
called also submediant.
[1913 Webster]
WordNet (r) 3.0 (2006):
submediant
n 1: (music) the sixth note of a major or minor scale (or the
third below the tonic)