Source : Webster's Revised Unabridged Dictionary (1913)

Traducer \Tra*du"cer\, n.
   1. One who traduces; a slanderer; a calumniator. --Bp. Hall.

   2. One who derives or deduces. [Obs.] --Fuller.

Source : WordNet®

traducer
     n : one who attacks the reputation of another by slander or
         libel [syn: {defamer}, {maligner}, {slanderer}, {vilifier},
          {libeler}, {backbiter}]