[1] : The Collaborative International Dictionary of English v.0.48

superfluous \super"fluous\, a. l. superfluus overflowing;
   super over, above + fluere to flow. see super-, and
   fluent.
   more than is wanted or is sufficient; rendered unnecessary by
   superabundance; unnecessary; useless; excessive; as, a
   superfluous price. --shak.
   1913 webster

         an authority which makes all further argument or
         illustration superfluous.                --e. everett.
   1913 webster

   superfluous interval mus., an interval that exceeds a
      major or perfect interval by a semitone.
      1913 webster

   syn: unnecessary; useless; exuberant; excessive; redundant;
        needless.
        1913 webster -- super"fluously, adv. --
        super"fluousness, n.
        1913 webster
see also:
super- fluent superfluous interval super"fluously super"fluousness 

Superfluous >> S Words
Superfluous, definition of term: Superfluous
superfluous_pag1.html

Interval >> I Words
Interval, definition of term: Interval
interval_pag1.html