D defs.my
Entry 1 sense Webster, 1913

Superdominant

· Su·per·dom·i·nant · IPA
01 n. The sixth tone of the scale; that next above the dominant; -- called also submediant.
  1. 1.
    The sixth tone of the scale; that next above the dominant; -- called also submediant.(Mus.) Also: submediant