D defs.my
Entry 1 sense Webster, 1913

Submediant

· Sub·me·di·ant · IPA
01 n. The sixth tone of the scale; the under mediant, or third below the keynote; the superdominant.
  1. 1.
    The sixth tone of the scale; the under mediant, or third below the keynote; the superdominant.(Mus.)