As an adjective superfluous
is in excess of what is required or sufficient.
As a noun ductor is
(obsolete) one who leads.
In excess of what is required or sufficient.
- With a full rain suit, carrying an umbrella may be superfluous .
* excessive, extraneous, extra, pleonastic, supernumerary, surplus, unnecessary, extravagant
(obsolete) One who leads.
(engineering, dated) A device for removing superfluous ink or colouring matter from a roller. See (doctor).
- (Sir Thomas Browne)