Superfluous /(?)/

Su·per·flu·ous

Superfluous

a.
  1. More than is wanted or is sufficient; rendered unnecessary by superabundance; unnecessary; useless; excessive; as, a superfluous price.
    An authority which makes all further argument or illustration superfluous.
    — E. Everett.

Phrases & Compounds

Superfluous interval
an interval that exceeds a major or perfect interval by a semitone.