The Collaborative International Dictionary
Superdominant
Superdominant \Su`per*dom"i*nant\, n. (Mus.) The sixth tone of the scale; that next above the dominant; -- called also submediant.
Wiktionary
superdominant
a. (context botany English) (rfdef: English) n. (context music English) The sixth tone of the scale, immediately above the dominant.